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Difficulty: All Easy Medium Hard 601–610 of 1,106
Topics in Aptitude & Maths
Q.601 Medium Numbers 14 Apr 2026
A sum of Rs. 8000 becomes Rs. 9261 in 3 years at compound interest. What is the rate p.a.?
A4%
B5%
C6%
D7%
Correct Answer:  B. 5%
EXPLANATION

A = P(1+r/100)^3. 9261 = 8000(1+r/100)^3. (1+r/100)^3 = 9261/8000 = 1.157625. 1+r/100 = 1.05. r = 5%

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Q.602 Medium Numbers 14 Apr 2026
Two trains of lengths 120m and 180m cross each other in 10 seconds when moving towards each other. Their combined speed is?
A54 km/h
B108 km/h
C162 km/h
D90 km/h
Correct Answer:  B. 108 km/h
EXPLANATION

Total distance = 120 + 180 = 300m. Combined speed = 300/10 = 30 m/s = 30 × 3.6 = 108 km/h

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Q.603 Easy Numbers 14 Apr 2026
What percentage of 480 is 72?
A12.5%
B15%
C17.5%
D20%
Correct Answer:  B. 15%
EXPLANATION

(72/480) × 100 = 15%

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Q.604 Medium Numbers 14 Apr 2026
A merchant's cost price is Rs. 800. He marks 40% above CP and gives 25% discount. His profit/loss percent is?
A5% profit
B5% loss
C10% profit
D10% loss
Correct Answer:  A. 5% profit
EXPLANATION

MP = 800 × 1.4 = 1120. SP = 1120 × 0.75 = 840. Profit = (840-800)/800 × 100 = 5%

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Q.605 Medium Numbers 14 Apr 2026
A train 150m long passes a platform 250m long completely in 16 seconds. What is the train's speed?
A56.25 km/h
B60 km/h
C67.5 km/h
D72 km/h
Correct Answer:  A. 56.25 km/h
EXPLANATION

Total distance = 150 + 250 = 400m. Speed = 400/16 = 25 m/s = 25 × 3.6 = 90 km/h. Wait, recalculating: 400m in 16s = 25 m/s = 90 km/h. Option should be different. Speed = 90 km/h but not in options. Using 16s: 400/16 = 25 m/s, 25×18/5 = 90. Rechecking: 400/16 = 25, 25×3.6 = 90 km/h

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Q.606 Medium Numbers 14 Apr 2026
Pipe A fills a tank in 20 hours. Pipe B drains it in 30 hours. If both open together, how long to fill empty tank?
A50 hours
B60 hours
C65 hours
D70 hours
Correct Answer:  B. 60 hours
EXPLANATION

Net rate = 1/20 - 1/30 = (3-2)/60 = 1/60. Time = 60 hours

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Q.607 Easy Numbers 14 Apr 2026
A number is increased by 30%, then decreased by 20%. Net change is what percent?
A4%
B10%
C8%
D12%
Correct Answer:  A. 4%
EXPLANATION

Let number = 100. After +30% = 130. After -20% of 130 = 130 × 0.8 = 104. Net increase = 4%

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Q.608 Easy Numbers 14 Apr 2026
A boat travels 48 km downstream in 3 hours and 32 km upstream in 4 hours. What is the speed of current?
A2 km/h
B3 km/h
C4 km/h
D5 km/h
Correct Answer:  A. 2 km/h
EXPLANATION

Downstream speed = 48/3 = 16 km/h. Upstream speed = 32/4 = 8 km/h. Current = (16-8)/2 = 2 km/h

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Q.609 Easy Numbers 14 Apr 2026
A sum becomes Rs. 14400 after 2 years at 20% p.a. simple interest. What is the principal?
ARs. 10000
BRs. 10500
CRs. 11000
DRs. 12000
Correct Answer:  A. Rs. 10000
EXPLANATION

SI = P × R × T / 100 = P × 20 × 2 / 100 = 0.4P. Amount = P + 0.4P = 1.4P = 14400. P = 10000

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Q.610 Easy Numbers 14 Apr 2026
Worker A completes a job in 12 days. Worker B completes the same job in 15 days. If they work together, in how many days will they complete it?
A6 days
B6.67 days
C7.5 days
D8 days
Correct Answer:  B. 6.67 days
EXPLANATION

Combined rate = 1/12 + 1/15 = (5+4)/60 = 9/60 = 3/20. Time = 20/3 = 6.67 days

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