WBPSC Clerkship · Aptitude & General Studies
Arithmetic & Quantitative Aptitude
12 practice questions with full step-by-step solutions — free, no sign-up.
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Arithmetic & Quantitative Aptitude — solved practice questions
8 Clerkship Aptitude & General Studies questions with step-by-step solutions. Attempt each, then reveal the answer.
- Q1easy
What is the HCF (greatest common divisor) of 24 and 36?
- A6
- B12
- C18
- D72
Show answer & solution
Correct answer: (B) 12
24 = 2^3 x 3 and 36 = 2^2 x 3^2, so the HCF is 2^2 x 3 = 12.
- Q2easy
A shopkeeper buys an article for Rs 400 and sells it for Rs 500. What is his profit percentage?
- A20%
- B25%
- C10%
- D125%
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Correct answer: (B) 25%
Profit = 500 - 400 = 100, so profit % = (100/400) x 100 = 25%.
- Q3easy
What is 15% of 240?
- A24
- B30
- C36
- D40
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Correct answer: (C) 36
15% of 240 = (15/100) x 240 = 36.
- Q4easy
The average of 10, 20, 30, 40 and 50 is:
- A25
- B30
- C35
- D40
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Correct answer: (B) 30
Sum = 150 and there are 5 numbers, so the average = 150/5 = 30.
- Q5medium
The simple interest on Rs 2000 at 5% per annum for 2 years is:
- ARs 100
- BRs 150
- CRs 200
- DRs 220
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Correct answer: (C) Rs 200
SI = (P x R x T)/100 = (2000 x 5 x 2)/100 = Rs 200.
- Q6medium
If two numbers are in the ratio 3 : 4 and their sum is 63, the larger number is:
- A27
- B28
- C36
- D40
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Correct answer: (C) 36
The parts total 3 + 4 = 7, so one part = 63/7 = 9; the larger number = 4 x 9 = 36.
- Q7medium
The LCM of 6, 8 and 12 is:
- A24
- B36
- C48
- D72
Show answer & solution
Correct answer: (A) 24
The smallest number divisible by 6, 8 and 12 is 24 (24/6=4, 24/8=3, 24/12=2).
- Q8easy
A train travels 180 km in 3 hours. What is its speed in km/h?
- A45
- B50
- C60
- D90
Show answer & solution
Correct answer: (C) 60
Speed = distance/time = 180/3 = 60 km/h.
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