6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

The average age of students of a class is 15.8 years. The average age of boys in the class is 16.4 years and that of the girls is 15.4 years. The ratio of the number of boys to the number of girls in the class is:-

A) 1:2	B) 2:3
C) 3:4	D) 3:5

Answer & Explanation Answer: B) 2:3

Explanation:

Let the ratio be x : y
Total boys = 16.4 X x
Total girls = 15.4 X y
Total number of students in class = 16.4x + 15.4y
The average age of all students is 15.8
The total age of boys is 15.8x
The total age of girls is 15.8y
16.4x + 15.4y = 15.8x + 15.8y
0.6 x = 0.4 y
x/y = 0.4/0.6 = 2/3

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Filed Under: Ratios and Proportions
Exam Prep: Bank Exams

2 1841

Q:

Find out the odd word/letters/number/number pair from the given alternatives.

A) VT	B) FD
C) PN	D) JM

Answer & Explanation Answer: D) JM

Explanation:

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Filed Under: Odd Man Out
Exam Prep: Bank Exams

0 1841

Q:

If the shopkeeper sells an item at Rs 1250 which is marked as Rs 1500, then what is the discount he is offering?

A) 20 percent	B) 16.67 percent
C) 25 percent	D) 10 percent

Answer & Explanation Answer: B) 16.67 percent

Explanation:

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Filed Under: Percentage
Exam Prep: Bank Exams

3 1841

Q:

If a - b = 2 and ab = 15, then what is the value of $a^{3} - b^{3}$ ?

A) 152	B) 112
C) 108	D) 98

Answer & Explanation Answer: D) 98

Explanation:

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Filed Under: Simplification
Exam Prep: Bank Exams

0 1841

Q:

If Cos θ = 35/37 , then what is the value of Cot θ?

A) 12/35	B) 35/12
C) 37/12	D) 12/37

Answer & Explanation Answer: B) 35/12

Explanation:

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Filed Under: Simplification
Exam Prep: Bank Exams

0 1840

Q:

If a - b = 1 and ab = 6, then what is the value of $a^{3} - b^{3}$ ?

A) 21	B) 23
C) 19	D) 25

Answer & Explanation Answer: C) 19

Explanation:

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Filed Under: Simplification
Exam Prep: Bank Exams

0 1840

Q:

If 5% of (P + Q) = 20% of (P – Q), then P is what percentage of Q?

A) 133.33	B) 166.66
C) 150	D) 171.33

Answer & Explanation Answer: B) 166.66

Explanation:

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Filed Under: Percentage
Exam Prep: Bank Exams

0 1840

Q:

If x - y = -9 and xy = -20, then find $x^{2} + y^{2}$ ?

A) 61	B) 41
C) 81	D) 51

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