Banking Exam Quantitative Aptitude 5

Question 1

If x + y = 10 and xy = 21, what is the value of x² + y²?

Accepted Answer

58

Answer

x² + y² = (x+y)² − 2xy = 100 − 42 = 58.

Question 2

A retailer buys goods at a 20% discount and sells them at the original marked price. What is the profit percentage?

Accepted Answer

25%

Answer

CP = 0.8 × MP; profit% = (MP − 0.8MP) / 0.8MP × 100 = 0.2/0.8 × 100 = 25%.

Question 3

A bank charges 2% per month on a credit card balance. What is the approximate annual interest rate (compounded monthly)?

Accepted Answer

26.8%

Answer

EAR = (1.02)^12 − 1 ≈ 1.2682 − 1 = 26.82% ≈ 26.8%.

Question 4

Two trains 120 m and 180 m long travel towards each other at 60 km/h and 90 km/h. How long do they take to cross each other?

Accepted Answer

7.2 seconds

Answer

Relative speed = 150 km/h = 41.67 m/s; time = 300/41.67 ≈ 7.2 seconds.

Question 5

What is 35% of 480?

Accepted Answer

168

Answer

35% of 480 = 0.35 × 480 = 168.

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