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High-Yield & Frequently Examined Questions

Questions curated and analyzed from official NEB/CDC past papers, recurring blueprint patterns, and full-mark rubrics.

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42 High-Yield Questions in Scope

Showing 42 high-yield questions

Repeated in NEB 2074, 2076, 2078, 2080 (High Priority 5-Mark Question)Class 12 • Physics • Unit 5
Rating: 5 / 5
Defensible Pedagogical Basis:

Specification Grid Section 2 (Heat and Thermodynamics): Derivation of Carnot engine efficiency η = 1 - T₂/T₁ with P-V cycle diagram appears in over 85% of board question pools.

Approach Summary: 1. Isothermal expansion (T₁): W₁ = nRT₁ ln(V₂/V₁); 2. Adiabatic expansion (T₁→T₂): W₂ = nCv(T₁-T₂); 3. Isothermal compression (T₂): W₃ = -nRT₂ ln(V₃/V₄); 4. Adiabatic compression (T₂→T₁): W₄ = -nCv(T₁-T₂). Show W_net = Q₁ - Q₂ and substitute adiabatic volume ratios to obtain η = 1 - T₂/T₁.
Open Chapter Unit 5 Notes →
Compulsory 4-Mark Derivation in NEB Calculus Group BClass 12 • Mathematics • Unit 12
Rating: 5 / 5
Defensible Pedagogical Basis:

Specification Grid Section 5 (Calculus): Derivation of standard integrals via partial fractions is a core competency required in NEB Grade 12 board examinations.

Approach Summary: Decompose 1/(x² - a²) into (1/2a)[1/(x - a) - 1/(x + a)], integrate each term to obtain (1/2a) ln|(x - a)/(x + a)| + C. Complete square for x² - 6x + 5 = (x - 3)² - 2² and substitute.
Open Chapter Unit 12 Notes →
Standard 4-Mark Question in NEB Chemistry Board ExamsClass 12 • Chemistry • Unit 2
Rating: 5 / 5
Defensible Pedagogical Basis:

Specification Grid Section 1 (Physical Chemistry): Buffer solutions and the Henderson-Hasselbalch equation are compulsory numerical and derivation items in NEB Group B.

Approach Summary: Set up equilibrium HA ⇌ H⁺ + A⁻ with Ka = [H⁺][A⁻]/[HA]. Take negative logarithm to obtain pH = pKa + log([A⁻]/[HA]). Explain why [A⁻] ≈ [Salt] and [HA] ≈ [Acid] due to common ion effect.
Open Chapter Unit 2 Notes →
Compulsory 8-Mark Question in Group C of NEB Final ExaminationsClass 12 • Business Mathematics II • Unit 1
Rating: 5 / 5
Defensible Pedagogical Basis:

Specification Grid LO 1.1: Leontief open input-output matrix inversion and Hawkins-Simon conditions.

Approach Summary: State technical coefficients definition and both Hawkins-Simon conditions. Compute (I-A), check determinant |I-A| = 0.60 > 0, invert matrix, and multiply by D.
Open Chapter Unit 1 Notes →
Highest Weightage 8-Mark Compulsory Practical Question in AccountingClass 12 • Principles of Accounting II • Unit 2
Rating: 5 / 5
Defensible Pedagogical Basis:

Company Act 2063 & NEB Specification Grid Unit 2: Issue, Pro-rata allotment, Forfeiture & Re-issue of Shares.

Approach Summary: Calculate pro-rata ratio (5:4), Ramesh applied 625 shares, excess application money Rs. 3,125. Allotment unpaid = Rs. 19,375. Pass forfeiture, re-issue, and transfer Rs. 6,500 to Capital Reserve.
Open Chapter Unit 2 Notes →
Compulsory in SEE 2070-2080 (Appears in ~95% of Board Sets)Class 10 • Compulsory Mathematics • Unit 12
Rating: 5 / 5
Defensible Pedagogical Basis:

Specification Grid Section C Compulsory Geometry: Out of 4 major circle theorems, central vs inscribed angle or cyclic quadrilateral opposite angles is guaranteed in Question 16.

Approach Summary: Construct diagonals or center rays to demonstrate that the central angles subtended by opposite arcs sum to 360°, hence the inscribed opposite angles sum to half of 360° = 180°.
Open Chapter Unit 12 Notes →
Frequent in SEE 2072-2080 (Physics 4-Mark Problem)Class 10 • Science & Technology • Unit 8
Rating: 5 / 5
Defensible Pedagogical Basis:

CDC Specification Grid Unit 8 (Pressure): Pascal’s law application numerical or diagrammatic analysis is tested annually as a high-ability application question.

Approach Summary: State Pascal’s law, apply F1/A1 = F2/A2 to calculate effort F1 = 1000 N, and explain that air bubbles compress and reduce efficiency.
Open Chapter Unit 8 Notes →
Compulsory in SEE Optional Math Group D (5 Marks)Class 10 • Optional Mathematics • Unit 4
Rating: 5 / 5
Defensible Pedagogical Basis:

CDC Class 10 Optional Mathematics Specification Grid: Homogeneous equation of second degree ax² + 2hxy + by² = 0 proof of acute angle tan θ = 2√(h² - ab) / (a + b) is the most repeated theoretical proof in optional mathematics.

Approach Summary: Let lines be y = m1 x and y = m2 x, relate slopes to coefficients (m1 + m2 = -2h/b and m1 m2 = a/b), substitute into tan θ formula, and derive a + b = 0 and h² = ab.
Open Chapter Unit 4 Notes →
Guaranteed Long Question in NEB Grade 11 Physics (Heat & Thermodynamics - 75% occurrence)Class 11 • Physics (Grade 11) • Unit 13
Rating: 5 / 5
Defensible Pedagogical Basis:

Specification Grid Content Area 2 (Heat and Thermodynamics): Derivation of pressure exerted by an ideal gas on container walls is a core 5-mark theoretical derivation required under CDC learning outcomes.

Approach Summary: Assume N molecules in a cubical container of side L. Calculate momentum transfer per collision along one axis, sum for all molecules, divide by wall area and time to find pressure P = (1/3)(mN/V)c_rms² = (1/3)ρ c_rms². Relate to PV = N k_B T to deduce E_avg = (3/2) k_B T.
Open Chapter Unit 13 Notes →
High-Frequency NEB Optics Derivation (Appears in ~65% of Board Papers)Class 11 • Physics (Grade 11) • Unit 17
Rating: 5 / 5
Defensible Pedagogical Basis:

Specification Grid Optics (Lenses): Derivation of Lens Maker’s Formula is the primary 4-to-5 mark derivation in the Optics section.

Approach Summary: Apply the single spherical surface refraction formula μ₂/v - μ₁/u = (μ₂ - μ₁)/R across two spherical surfaces of a thin lens. Combine equations and let u -> ∞ to obtain 1/f = (μ - 1)(1/R₁ - 1/R₂).
Open Chapter Unit 17 Notes →
Compulsory in Computational Methods (Group B or C - 4 to 6 Marks)Class 11 • Mathematics (Grade 11) • Unit 16
Rating: 5 / 5
Defensible Pedagogical Basis:

Specification Grid Section 5 (Computational Methods): Root finding by Newton-Raphson method is explicitly mandatory under CDC Grade 11 Mathematics.

Approach Summary: Use tangent line slope or Taylor series expansion f(x_n + h) ≈ f(x_n) + h f'(x_n) = 0 to obtain h = -f(x_n)/f'(x_n). Iterate for x³ - 2x - 5 = 0 until |x_{n+1} - x_n| < 0.0005.
Open Chapter Unit 16 Notes →
Guaranteed Long Question in Botany Board Exam (Floral Diversity - 8 Marks)Class 11 • Biology (Grade 11) • Unit 2
Rating: 5 / 5
Defensible Pedagogical Basis:

Specification Grid Section A (Botany): Angiosperm families (Solanaceae or Fabaceae) diagnostic description with floral formula and diagram is an annual 8-mark fixture.

Approach Summary: Detail habit, stem, alternate leaves, cyme inflorescence, actinomorphic pentamerous flower, gamosepalous persistent calyx, epipetalous stamens, bicarpellary syncarpous superior ovary with swollen axile placentation and oblique orientation. Give floral formula, floral diagram, and 2 economic species.
Open Chapter Unit 2 Notes →
Top-Priority Long Question in Environment Science (Group C - 8 Marks)Class 11 • Environment Science (Grade 11) • Unit 4
Rating: 5 / 5
Defensible Pedagogical Basis:

Official CDC Model Question Paper Group C (Q22): Water quality testing protocols (DO, BOD, COD, Arsenic) is the primary applied chemical parameter topic.

Approach Summary: Define each parameter, explain analytical principles (Winkler method for DO, 5-day incubation for BOD, dichromate reflux for COD, hydride generation AAS for Arsenic), detail health/ecological impacts, and provide exact national threshold standards.
Open Chapter Unit 4 Notes →
Frequently examined in NEB Grade 11 Compulsory English Board ExamsClass 11 • Compulsory English (Grade 11) • Unit 1
Rating: 5 / 5
Defensible Pedagogical Basis:

CDC Specification Grid Section 1 (Reading Texts - Short/Long Answer): Speech of Malala Yousafzai is a flagship text on universal human rights and education.

Approach Summary: Malala asserts that a sword can only destroy physical bodies, whereas the pen transforms minds, enlightens consciousness, and dismantles dogmatic tyrannies permanently. Extremists fear pens and books because literacy empowers people to question oppressive dogmas, and they particularly fear educated women whose independence directly threatens patriarchal despotism.
Open Chapter Unit 1 Notes →
Core Pedagogical Question in CDC Communication UnitClass 11 • Compulsory English (Grade 11) • Unit 2
Rating: 5 / 5
Defensible Pedagogical Basis:

CDC Specification Grid Section 1: Peter Elbow’s freewriting theory tests student understanding of the dual stages of composition (generating vs editing).

Approach Summary: Premature editing forces the human brain to simultaneously act as a creative producer and a critical judge. This causes cognitive paralysis and fear of error. Freewriting silences the internal censor by keeping the hand moving without stopping, which allows thoughts to flow directly and naturally, giving prose authentic cadence, resonance, and personal voice.
Open Chapter Unit 2 Notes →
High-Yield Analytical Essay Question in Board ExaminationsClass 11 • Compulsory English (Grade 11) • Unit 3
Rating: 5 / 5
Defensible Pedagogical Basis:

CDC Specification Grid Section 1: Sports journalism analysis testing comprehension of psychological dynamics, penalty pressure, and tactical resilience.

Approach Summary: The match demonstrated that home crowd support can inspire early euphoria but can transform into paralyzing pressure if the opponent equalizes and commands midfield possession. Mancini’s triumph shows that embracing setbacks as clean-slate learning opportunities and prioritizing collective tactical joy over fear produces enduring athletic excellence.
Open Chapter Unit 3 Notes →
Core Science-Technology Expository QuestionClass 11 • Compulsory English (Grade 11) • Unit 4
Rating: 5 / 5
Defensible Pedagogical Basis:

CDC Specification Grid Section 1: Technical expository reading text testing physical comprehension of aerodynamic drag and vacuum transit.

Approach Summary: Hyperloop achieves 760 mph velocities by eliminating the two main physical forces that slow down vehicles: aerodynamic drag (by pumping air out of sealed tubes) and mechanical track friction (using magnetic levitation or air-bearing skis). It offers zero direct carbon emissions, lower operating costs than rail, and relief from urban gridlock.
Open Chapter Unit 4 Notes →
Repeatedly Tested Theme in NEB Board Literature & Education UnitsClass 11 • Compulsory English (Grade 11) • Unit 5
Rating: 5 / 5
Defensible Pedagogical Basis:

CDC Specification Grid Section 1: Biographical narrative evaluation examining pedagogical effectiveness and moral courage in educational environments.

Approach Summary: Iyer’s seaside demonstration transformed an abstract, incomprehensible physics lecture into a vivid living reality by allowing students to see real birds flap wings and steer. Sastry’s stern rebuke of the communal teacher proved that bigotry in schools must be confronted immediately and decisively by community elders.
Open Chapter Unit 5 Notes →
High probability essay and comprehension theme in NEB Compulsory EnglishClass 11 • Compulsory English (Grade 11) • Unit 6
Rating: 5 / 5
Defensible Pedagogical Basis:

CDC Specification Grid Section 1 (Reading / Critical Thinking): Contemporary technology & financial literacy themes.

Approach Summary: QR code payments lower hardware costs (no costly POS terminals), eliminate physical currency printing and counterfeit risks, and accelerate transaction speeds. In Nepal, hurdles include digital illiteracy, intermittent cellular connectivity in rural mountains, cyber fraud risks, and high cash preference.
Open Chapter Unit 6 Notes →
Key scientific comprehension & critical evaluation topic in NEB examsClass 11 • Compulsory English (Grade 11) • Unit 7
Rating: 5 / 5
Defensible Pedagogical Basis:

CDC Curriculum Unit: Humour — Analytical evaluation of behavioral science and non-verbal human communication.

Approach Summary: Scott discovered that most human laughter occurs during ordinary conversation to signal agreement, mutual liking, and in-group belonging. Physiologically, laughing triggers the release of endorphins—the body’s natural opioid analgesics—which soothe muscular tension and increase pain thresholds.
Open Chapter Unit 7 Notes →
Frequently featured in NEB Board cultural and environmental writing promptsClass 11 • Compulsory English (Grade 11) • Unit 8
Rating: 5 / 5
Defensible Pedagogical Basis:

CDC Curriculum Unit: Human Culture — Anthropological critique of consumerism and modern sustainable waste management.

Approach Summary: Sodaigomi stems from compact house designs lacking storage, combined with cultural demands for pristine purity and taboos against used items. In Nepal, 3Rs can be institutionalized through source segregation, decentralized composting of organic waste, and formalization of scrap-recycling enterprises.
Open Chapter Unit 8 Notes →
Flagship Environmental Non-Fiction text for NEB Grade 11 ExaminationsClass 11 • Compulsory English (Grade 11) • Unit 9
Rating: 5 / 5
Defensible Pedagogical Basis:

CDC Curriculum Unit: Ecology and Environment — Exploration of environmental courage, corporate accountability, and direct action.

Approach Summary: After a traumatic car accident recalibrated her values, Hill climbed a 1,000-year-old redwood to halt clear-cutting by the Pacific Lumber Company. She survived sub-zero storms, supply blockades, helicopter intimidation, and death threats, ultimately negotiating a permanent preservation covenant.
Open Chapter Unit 9 Notes →
Guaranteed 5-Mark Question in NEB Accounting (Appears in 100% of Board Sets)Class 11 • Principles of Accounting I • Unit 4
Rating: 5 / 5
Defensible Pedagogical Basis:

Specification Grid Section 2 (Accounting Process): Bank Reconciliation Statement (BRS) is a compulsory 5-mark numerical problem in Group B of the NEB board examination.

Approach Summary: Define BRS as an explanatory memorandum statement prepared periodically. State four core objectives: detecting errors, updating records, preventing embezzlement, and ascertaining exact bank liquidity. List timing differences and transactions recorded first by the bank.
Open Chapter Unit 4 Notes →
Core Calculus Long Question in NEB Business Math (Group C - 8 Marks)Class 11 • Business Mathematics • Unit 2
Rating: 5 / 5
Defensible Pedagogical Basis:

Specification Grid Content Area 2 (Calculus): Profit maximization using marginal revenue MR and marginal cost MC is a standard 6-to-8 mark application problem.

Approach Summary: State first order dπ/dQ = 0 (MR = MC) and second order d²π/dQ² < 0. Express TR = P × Q = 70Q - Q². Compute MR = 70 - 2Q and MC = 4Q + 10. Equate to find Q = 10 units, P = Rs. 60, and π = Rs. 250.
Open Chapter Unit 2 Notes →
Annual Microeconomics Board Exam Question (Group B/C - 5 to 8 Marks)Class 11 • Economics I • Unit 3
Rating: 5 / 5
Defensible Pedagogical Basis:

Specification Grid Microeconomics: Consumer behavior through cardinal utility and the Law of Diminishing Marginal Utility is a foundation concept.

Approach Summary: State Marshall’s law that marginal utility declines with each successive unit consumed. Present utility schedule showing increasing TU at decreasing rate, peaking when MU = 0. Draw downward sloping MU curve and list assumptions/limitations (homogeneity, continuity, rational consumer, constant marginal utility of money).
Open Chapter Unit 3 Notes →
Compulsory Long Numerical in NEB Finance Model Paper (Group C - 8 Marks)Class 11 • Finance • Unit 1
Rating: 5 / 5
Defensible Pedagogical Basis:

Official CDC Model Question Paper Group C (Q20): Loan amortization schedule, periodic payment calculation, and interest/principal fraction breakdown.

Approach Summary: Compute PMT = P / PVIFA(12%, 5) = 500,000 / 3.604776 = Rs. 138,704.87. Construct a 5-year table showing beginning balance, payment, interest, principal repayment, and ending balance.
Open Chapter Unit 1 Notes →
Compulsory 6-Mark Question in BLE Municipality Board ExaminationClass 8 • Science and Technology
Rating: 5 / 5
Defensible Pedagogical Basis:

Grade 8 BLE Specification Grid: Classification of Levers, Mechanical Advantage, and Efficiency.

Approach Summary: Define simple machine. Explain position of F, L, E in 1st, 2nd, and 3rd class levers with examples. State why 2nd class levers always have MA > 1.
High-Frequency 5-Mark Question in Grade 9 Annual ExaminationClass 9 • Compulsory Mathematics • Unit 1
Rating: 5 / 5
Defensible Pedagogical Basis:

Grade 9 Mathematics Specification Table: Compound Depreciation and Taxation.

Approach Summary: Compute diminishing value after 2 years at 10% (Rs. 2,025,000) and third year at 15% (Rs. 1,721,250). Add 13% VAT to find final price Rs. 1,945,012.50.
Open Chapter Unit 1 Notes →
Compulsory 7-Mark Long Question in Technical Stream Annual ExaminationClass 9 • Construction Technology (Technical Stream) • Unit 1
Rating: 5 / 5
Defensible Pedagogical Basis:

CDC Ref 3804 Specification Chart: Unit 1 Building Materials (Bricks and Cement).

Approach Summary: Explain preparation of clay, hand/machine moulding, natural drying, and kiln burning. List 5 characteristics of first-class bricks including compressive strength >= 10.5 N/mm2 and water absorption <= 20%.
Open Chapter Unit 1 Notes →
High-Yield 6-Mark Creative Writing Question in Municipality BLE ExamClass 8 • Compulsory English • Unit 5
Rating: 5 / 5
Defensible Pedagogical Basis:

BLE CDC Ref 10501 Specification Grid: Unit 5 Posters & Advisory Writing.

Approach Summary: Design structured health poster with slogan, do's, don'ts, Conditional Type II sentences ("If we ate healthy food, we would fall sick less often"), and issuer credit.
Open Chapter Unit 5 Notes →
Asked in NEB 2075, 2077, 2079, 2080Class 12 • Physics • Unit 1
Rating: 5 / 5
Defensible Pedagogical Basis:

Directly maps to CDC Specification Grid LO 1.3: Acceleration of rolling bodies on an inclined plane. Frequently tested as a 4-mark theoretical derivation or numerical.

Approach Summary: Apply energy conservation or torque balance: a = (g sin θ) / (1 + k²/R²). Compare k²/R² values: 0.40 (solid sphere) vs 0.50 (solid cylinder).
Open Chapter Unit 1 Notes →
Repeated in NEB 2074, 2076, 2078, 2080Class 12 • Physics • Unit 1
Rating: 5 / 5
Defensible Pedagogical Basis:

Directly addresses CDC Specification Grid LO 1.2: Relation between torque and angular momentum, conditions of equilibrium, and conservation principles. Core 4-mark theoretical board question.

Approach Summary: State ΣF = 0 and Στ = 0. Differentiate L = Iω to yield dL/dt = Iα = τ. Explain that in free fall τ_ext = 0, so the cat rotates front and rear body segments in opposite directions with different moments of inertia to achieve 180° rotation with net zero angular momentum.
Open Chapter Unit 1 Notes →
Featured in NEB 2075, 2079 & CDC Model QuestionsClass 12 • Physics • Unit 1
Rating: 5 / 5
Defensible Pedagogical Basis:

Assesses deep conceptual understanding of the role of static friction in rolling without slipping, derivation of limiting friction coefficient, and mechanical energy conservation.

Approach Summary: Set up translational equation Mg sin θ - f = Ma and rotational equation f·R = Iα. Solve for f = (Mg sin θ) / (1 + R²/k²). Use f ≤ μ_s N = μ_s Mg cos θ to yield μ_s ≥ tan θ / (1 + R²/k²). Static friction does zero work because the contact point is instantaneously at rest.
Open Chapter Unit 1 Notes →
High-yield regular derivation in NEB Physics Section BClass 12 • Physics • Unit 1
Rating: 4 / 5
Defensible Pedagogical Basis:

Theorem of Parallel Axes and Theorem of Perpendicular Axes are core syllabus items in CDC Unit 1. Frequently asked to determine moment of inertia for standard symmetric shapes.

Approach Summary: State both theorems precisely. Apply I_tangent = I_d + M d² with d = R and I_d = (1/4) M R² to obtain I_tangent = (5/4) M R².
Open Chapter Unit 1 Notes →
Recurring every year in NEB Accountancy Board ExamClass 12 • Principles of Accounting II • Unit 1
Rating: 5 / 5
Defensible Pedagogical Basis:

Accounting for Share Capital is assigned 10 marks in the NEB Class 12 specification grid, invariably featuring Pro-rata Allotment or Forfeiture/Re-issue.

Approach Summary: The Board of Directors has the discretion to re-issue forfeited shares. Maximum allowable discount cannot exceed the amount originally forfeited on those specific shares.
Open Chapter Unit 1 Notes →
Standard NEB Board 8-Mark Compulsory Question pattern (Acc.104)Class 12 • Principles of Accounting II • Unit 1
Rating: 5 / 5
Defensible Pedagogical Basis:

In the NEB Class 12 Principles of Accounting examination, a comprehensive 8-mark numerical involving 3:2 Pro-rata allotment, forfeiture of shares before first call, and partial re-issue is the benchmark examination question.

Approach Summary: Calculate excess application money (NPR 450,000) and Pradeep's net arrears on allotment (NPR 7,500). Debit Share Capital with NPR 70 (called-up amount before first call). Call made on remaining 29,700 shares. Re-issue 200 shares @ NPR 80; transfer NPR 5,000 to Capital Reserve.
Open Chapter Unit 1 Notes →
Tested in NEB 2078, 2079, 2080 Board ExamsClass 12 • Principles of Accounting II • Unit 1
Rating: 5 / 5
Defensible Pedagogical Basis:

Examines the crucial distinction between forfeiture when securities premium is received vs when it remains unpaid, together with complete presentation on the Statement of Financial Position.

Approach Summary: Debited Securities Premium on Mr. A's forfeiture because premium was unpaid; do not touch Securities Premium on Mr. B's forfeiture because premium was already collected. Transfer NPR 7,500 to Capital Reserve. Balance Sheet reflects 19,800 fully paid shares plus NPR 12,000 forfeiture balance for Mr. B's 200 unreissued shares.
Open Chapter Unit 1 Notes →
SEE 2076, 2078, 2079, 2080Class 10 • Science & Technology • Unit 1
Rating: 5 / 5
Defensible Pedagogical Basis:

Core learning competency on Earth gravitation: explains why the acceleration due to gravity differs between poles and equator, and during spaceflight.

Approach Summary: Earth is an oblate spheroid; polar radius Rp < equator radius Re. Since g = GM/R², g at poles is larger. Halving radius quadruples surface g, making weight 4 times heavier.
Open Chapter Unit 1 Notes →
Repeated in NEB 2075, 2077, 2079, 2080Class 11 • Physics (Grade 11) • Unit 1
Rating: 5 / 5
Defensible Pedagogical Basis:

Directly addresses CDC Specification Grid LO 1.1: Vector addition laws and conditions for maximum, minimum, and orthogonal resultants.

Approach Summary: State both laws. Use R = √(P² + Q² + 2PQ cos θ) with P = Q = F. (a) θ = 0° (parallel, R = 2F), (b) θ = 180° (antiparallel, R = 0), and (c) θ = 120° (R = F).
Open Chapter Unit 1 Notes →
Mandatory 5-Mark Question in NEB Class 11 Board ExamsClass 11 • Principles of Accounting I • Unit 1
Rating: 5 / 5
Defensible Pedagogical Basis:

Assesses foundational competency in double-entry bookkeeping, GAAP dual aspect concept, and transaction impact on Assets = Liabilities + Capital.

Approach Summary: Define Dual Aspect Concept (every debit has an equal credit). Show that Assets = Liabilities + Capital remains perpetually in equilibrium across asset-asset, asset-liability, asset-capital, and expense/revenue transactions.
Open Chapter Unit 1 Notes →
Tested in SEE 2076, 2078, 2079, 2080Class 10 • Compulsory Mathematics • Unit 1
Rating: 5 / 5
Defensible Pedagogical Basis:

Directly maps to CDC SEE Specification Grid: 4-mark compulsory question on comparing annual vs semi-annual compounding options.

Approach Summary: Calculate CI_A = NPR 21,000 and CI_B = NPR 21,550.63. Scheme B is more profitable by NPR 550.63 due to higher compounding frequency.
Open Chapter Unit 1 Notes →
Mandatory in BLE Municipality Board Exams 2078, 2079, 2080Class 8 • Science and Technology
Rating: 5 / 5
Defensible Pedagogical Basis:

BLE core competency on mechanics: Definitions, proof of efficiency formula, and real-world application of simple machines.

Approach Summary: Define MA = Load/Effort, VR = Effort dist/Load dist, Efficiency = Output Work/Input Work * 100%. Substitute definitions to prove η = (MA/VR) * 100%. Friction and machine self-weight ensure Output Work < Input Work.