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Arithmetic and reasoning
22 Government jobs Mental ability questions with answers and explanations.
Printable worksheet with answer key
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What is 20 percent of 350?
- 1 70
- 2 35
- 3 80
- 4 60
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If the ratio of boys to girls in a class is 3 : 2 and there are 30 students, how many are girls?
- 1 10
- 2 15
- 3 12
- 4 18
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A train travels 240 km in 4 hours. Its speed is:
- 1 50 km/h
- 2 80 km/h
- 3 40 km/h
- 4 60 km/h
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The average of 10, 20, 30 and 40 is:
- 1 28
- 2 25
- 3 20
- 4 30
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A man buys an article for Rs. 500 and sells it for Rs. 600. His profit percent is:
- 1 25%
- 2 20%
- 3 16.7%
- 4 10%
Show answer
Correct answer: 20%
Profit is 100 on a cost of 500, so 100/500 × 100 = 20%.
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A can finish a job in 10 days and B in 15 days. Working together they finish it in:
- 1 8 days
- 2 12 days
- 3 5 days
- 4 6 days
Show answer
Correct answer: 6 days
The daily work is 1/10 + 1/15 = 1/6, so they take 6 days.
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Ali is taller than Bilal, and Bilal is taller than Chand. Who is the shortest?
- 1 Bilal
- 2 Cannot say
- 3 Ali
- 4 Chand
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A person walks 5 km north, then 5 km east. How far is he from the start?
- 1 5 km
- 2 About 8 km
- 3 10 km
- 4 About 7.07 km
Show answer
Correct answer: About 7.07 km
The distance is √(5² + 5²) = √50, which is about 7.07 km.
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If today is Wednesday, what day will it be after 10 days?
- 1 Monday
- 2 Sunday
- 3 Friday
- 4 Saturday
Show answer
Correct answer: Saturday
10 days is 1 week and 3 days, and 3 days after Wednesday is Saturday.
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Simple interest on Rs. 2,000 at 10 percent a year for 2 years is:
- 1 Rs. 300
- 2 Rs. 420
- 3 Rs. 200
- 4 Rs. 400
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A shopkeeper sells a pen at a loss of 10 percent for Rs. 90. Its cost price is:
- 1 Rs. 99
- 2 Rs. 80
- 3 Rs. 110
- 4 Rs. 100
Show answer
Correct answer: Rs. 100
Selling price is 90 percent of cost: cost = 90 / 0.9 = 100.
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The square root of 1,296 is:
- 1 34
- 2 46
- 3 26
- 4 36
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If 6 workers can build a wall in 12 days, how many days will 9 workers take?
- 1 18
- 2 6
- 3 10
- 4 8
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What is 15 percent of 240?
- 1 36
- 2 40
- 3 24
- 4 30
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The average of five numbers is 20. If one number is removed, the average of the other four becomes 18. The removed number is:
- 1 18
- 2 20
- 3 24
- 4 28
Show answer
Correct answer: 28
Total was 100 and is now 72, so the removed number is 28.
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A car travels 150 km in 2.5 hours. Its speed is:
- 1 60 km/h
- 2 75 km/h
- 3 50 km/h
- 4 65 km/h
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Two numbers are in the ratio 3 : 5 and their sum is 64. The larger number is:
- 1 30
- 2 32
- 3 24
- 4 40
Show answer
Correct answer: 40
The parts total 8, so one part is 8 and the larger number is 5 x 8 = 40.
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If the price of an item rises from Rs. 200 to Rs. 250, the percentage increase is:
- 1 50%
- 2 25%
- 3 20%
- 4 10%
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The LCM of 12 and 18 is:
- 1 36
- 2 72
- 3 6
- 4 216
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A clock shows 3:15. The angle between the hands is:
- 1 7.5°
- 2 0°
- 3 15°
- 4 22.5°
Show answer
Correct answer: 7.5°
The minute hand is at 90° and the hour hand at 97.5°, so the angle is 7.5°.
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How many days are there in 4 weeks and 3 days?
- 1 31
- 2 28
- 3 35
- 4 30
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A sum of Rs. 5,000 amounts to Rs. 5,600 in 2 years at simple interest. The rate per year is:
- 1 5%
- 2 12%
- 3 10%
- 4 6%
Show answer
Correct answer: 6%
Interest is 600 in 2 years, so 300 a year, which is 6 percent of 5,000.