Examination Preparation

Mathematical Aptitude Quiz

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Test your quantitative and logical reasoning skills with these exam-style questions. Ensure you have scratch paper ready before proceeding.

1. Find the next number in the series: 3, 8, 15, 24, ?

  1. 31
  2. 33
  3. 35
  4. 37
View Answer & Explanation

Correct Answer: C

Explanation: Analyze the differences between consecutive terms:
8 - 3 = 5
15 - 8 = 7
24 - 15 = 9
The differences are consecutive odd numbers (5, 7, 9). The next difference must be 11.
24 + 11 = 35.

2. A man buys a watch for ₹1200 and sells it for ₹1500. What is his profit percentage?

  1. 20%
  2. 25%
  3. 30%
  4. 15%
View Answer & Explanation

Correct Answer: B

Explanation:
Cost Price (CP) = 1200
Selling Price (SP) = 1500
Profit = SP - CP = 1500 - 1200 = 300
Profit % = \( (\frac{300}{1200}) \times 100 \)
= \( \frac{1}{4} \times 100 \) = 25%.

3. If 'DELHI' is coded as 'CCIDD', how would you code 'BOMBAY'?

  1. AJMTVT
  2. AMJXVS
  3. MJXVSU
  4. AMJXWU
View Answer & Explanation

Correct Answer: B

Explanation:
D (-1) = C
E (-2) = C
L (-3) = I
H (-4) = D
I (-5) = D
The shift pattern is -1, -2, -3, -4, -5.
Applying to BOMBAY:
B (-1) = A
O (-2) = M
M (-3) = J
B (-4) = X
A (-5) = V
Y (-6) = S
Result: AMJXVS.

4. A train 150m long is running at a speed of 90 km/hr. How long will it take to pass a pole?

  1. 5 seconds
  2. 6 seconds
  3. 8 seconds
  4. 10 seconds
View Answer & Explanation

Correct Answer: B

Explanation:
Distance to cover = Length of train = 150 m.
Convert speed to m/s: \( 90 \times \frac{5}{18} = 25 \) m/s.
Time = \( \frac{\text{Distance}}{\text{Speed}} \)
Time = \( \frac{150}{25} \) = 6 seconds.