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waec2006economics
Q1. The difference between the Gross National Product (GNP) and the Gross Domestic Product(GDP) is
Atotal interest payment
Bnet income generated internally
Ctotal national savings
Dnet income from abroad.
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waec2023physics
Q2. Light of wavelength 589 nm in vacuum passes through a piece of fused quartz of index of refraction n = 1.458. What is the frequency of the light in fused quartz? [Speed of light c = 3.00×10⁸ms⁻¹]
A5.09×10¹⁵Hz
B5.09×10¹⁴ Hz
C1.77×10¹⁵ Hz
D1.77×10¹⁴ Hz
Correct Answer: B
Given information:
Wavelength in vacuum, λ₀ = 589 nm = 589 × 10⁻⁹ m
Refractive index of fused quartz, n = 1.458
Speed of light in vacuum, c = 3.00 × 10⁸ m/s
Frequency in fused quartz, f = ?
Solution:
Step 1: Key principle
When light passes from one medium to another:
Frequency remains constant
Wavelength and speed change
Step 2: Calculate frequency using vacuum values
Using the wave equation:
c = fλ₀
f = c/λ₀
Step 3: Substitute values
f = (3.00 × 10⁸)/(589 × 10⁻⁹)
f = (3.00 × 10⁸)/(5.89 × 10⁻⁷)
f = 5.093 × 10¹⁴ Hz
f ≈ 5.09 × 10¹⁴ Hz
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waec2021computerstudies
Q3. What is the purpose of a watermarking technique in digital media?
ATo increase data size
BTo embed ownership information invisibly
CTo enhance graphic design
DTo manage software updates
Correct Answer: B
Digital watermarking embeds imperceptible markers into images, audio, or video to prove ownership and track unauthorized use without altering perception.
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waec2022computerstudies
Q4. Which of the following is a characteristic of a fog computing system?
ACentralized data processing
BDistributed computing near data sources
CLimited to cloud storage
DHigh latency
Correct Answer: B
Fog computing extends cloud capabilities to the network edge (e.g., IoT gateways), processing data locally near sources to reduce latency, bandwidth use, and cloud dependency in time-sensitive applications.
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waec2023english
Q5. From the words lettered A to D, choose the interpretation that is most appropriate for each sentence. Mother always tells me to keep my nose clean. This means that she tells me to _________
Astay healthy
Bdo what pleases me
Cstay out of trouble
Dbe focused
Correct Answer: C
The idiom means to behave properly and avoid trouble.
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waec2022englishlit
Q6. In William Shakespeare's A Midsummer Night's Dream, the speaker's attitude towards melancholy in 'Turn melancholy forth to funerals' is
Acowardly
Bsolemn
Cdismissive
Dsilly
Correct Answer: C
Theseus rejects melancholy as unfit for celebration, showing a dismissive attitude.
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waec2023mathematics
Q7. If A = { 1, 2, 3, 4, 5, 6}, B = { 2, 4, 6, 8 }. Find (A – B) ⋃ (B – A).
A{1, 3, 5, 8}
B{8}
C{1, 2, 3, 4, 5, 6, 8}
D{1, 3, 5}
Correct Answer: A
A = { 1, 2, 3, 4, 5, 6}
B = { 2, 4, 6, 8 }
A - B = { 1, 3, 5 }
B - A = { 8 }
∴ (A - B) ⋃ (B - A) = {1, 3, 5, 8}
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waec2016civiledu
Q8. Children that are not cared for are mostly prone to
Acriminal attitudes
Bterminal diseases
Cexamination failure
Dforced migration
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waec2024physics
Q9. The depolarizing agent in a Leclanché cell is
Apowdered carbon
Bmanganese (IV) oxide
Ccarbon rod
Dammonium
Correct Answer: B
MnO₂ depolarizes by reacting with H₂ at the anode.
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waec2012economics
Q10. The following are features of subsistence agriculture except
Alittle capital
Bprocessing of raw materials
Csmall allotments of land
Duse of crude implements
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waec2010insurance
Q11. The payment made by the insured to the insurer upon which the validity of insurance is based is called
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waec2022biology
Q12. The major sources of vitamin A are
Aegg yolk, carrot and palm oil
Bmango, pawpaw and eggs
Csorghum, soya bean and liver
Drice bran, green vegetables and milk
Correct Answer: A
Vitamin A (retinol) is in animal sources like egg yolk; precursors (beta-carotene) in carrots and palm oil, essential for vision and immunity.
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waec2024economics
Q13. If Gross Domestic Product (GDP) is $300 million and depreciation is $25 million, the value of Net National Product (NNP) is
A$10m
B$275m
C$300m
D$500m
Correct Answer: B
Net National Product (NNP) is calculated as GDP minus depreciation (capital consumption allowance), so NNP = $300m - $25m = $275m.
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waec2018mathematics
Q14. The probabilities that John and James pass an examination are 3/4 and 3/5 respectively. Find the probability of both boys failing the examination.
A1/10
B2/10
C9/20
D11/20
Correct Answer: D
Pr(both John and James passed)
= 3/4 x 3/5 = 9/20
Pr(john and james failed)= 1-Pr(john and james passed)
= 1 – 920
= 11/20
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waec2020civiledu
Q15. The Universal Adult Suffrage means that
Aonly educated adults can vote
Ball adults have the right to vote
Cvoting is restricted to men
Donly the rich can vote
Correct Answer: B
One-person-one-vote for adults (18+), promoting equality; excludes qualifications.
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waec2023fineart
Q16. Which art movement emphasized the use of pure color and form over realistic representation?
AFauvism
BRealism
CBaroque
DRenaissance
Correct Answer: A
Fauvism, led by Matisse, used bold, non-naturalistic colors and simplified forms to express emotion, as in *Woman with a Hat*.
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waec2007economics
Q17. The main objective of privatizing a government business is to
Acreate additional employment
Bincrease expenditure
Csource for new funds
Dincrease the level of efficiency
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waec2021mathematics
Q18. The HCF of 12 and 18 is
A6
B3
C2
D9
Correct Answer: A
Highest Common Factor (HCF) is the largest number dividing both without remainder. Factors of 12: 1,2,3,4,6,12; of 18: 1,2,3,6,9,18. Common: 1,2,3,6; largest is 6. Using Euclidean algorithm: 18 = 1×12 + 6, 12 = 2×6 + 0, HCF=6.
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waec2020computerstudies
Q19. What is the function of a chiral metamaterial in wireless communication?
ATo enhance graphic output
BTo manipulate electromagnetic waves uniquely
CTo increase network speed
DTo manage software licenses
Correct Answer: B
Chiral metamaterials exhibit handedness, enabling unique EM wave manipulation like circular polarization conversion or negative refraction, improving signal isolation and bandwidth in antennas.
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waec2022civiledu
Q20. Representation of Nigerians in the senate is
Aproportional
Bcollegial
Cequal
Dunequal
Correct Answer: C
The Nigerian Senate provides equal representation with three senators per state regardless of population size, ensuring federal balance and equal voice for all states.