Banking Exam Quantitative Aptitude 3

Question 1

A train 200 m long passes a pole in 10 seconds. How long will it take to pass a platform 300 m long?

Accepted Answer

25 seconds

Answer

Speed = 200/10 = 20 m/s; time to pass platform = (200+300)/20 = 25 seconds.

Question 2

What is the compound interest on $5,000 at 10% per annum for 2 years, compounded annually?

Accepted Answer

$1,050

Answer

Amount = 5000 × (1.1)² = 6,050; CI = 6,050 − 5,000 = $1,050.

Question 3

Two numbers are in the ratio 4:7. If 6 is subtracted from each, the ratio becomes 2:5. Find the larger number.

Accepted Answer

35

Answer

Let numbers be 4x and 7x; (4x−6)/(7x−6) = 2/5 → x = 5; larger = 7×5 = 35.

Question 4

A man rows upstream at 6 km/h and downstream at 10 km/h. What is the speed of the current?

Accepted Answer

2 km/h

Answer

Speed of current = (downstream − upstream) / 2 = (10 − 6) / 2 = 2 km/h.

Question 5

Find the missing term in the series: 2, 6, 12, 20, 30, ?

Accepted Answer

42

Answer

Differences are 4, 6, 8, 10, 12; next term = 30 + 12 = 42.

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