6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

In how many ways can a group of 5 men and 2 women be made out of a total of 7 men and 3 women?

A) 135	B) 63
C) 125	D) 64

Answer & Explanation Answer: B) 63

Explanation:

Required number of ways = $(7 C_{5} * 3 C_{2}) = (7 C_{2} * 3 C_{1}) = 63$

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Filed Under: Permutations and Combinations

52 46293

Q:

Three unbiased coins are tossed.What is the probability of getting at least 2 heads?

A) 1/4	B) 1/2
C) 3/4	D) 1/3

Answer & Explanation Answer: B) 1/2

Explanation:

Here S= {TTT, TTH, THT, HTT, THH, HTH, HHT, HHH}.

Let E = event of getting at least two heads = {THH, HTH, HHT, HHH}.

P(E) = n(E) / n(S)

= 4/8= 1/2

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Filed Under: Probability

92 46046

Q:

If ${(x - 7)}^{2} + {(y + 10)}^{2} + {(z - 6)}^{2} = 0$ , then find the value of x + y+ z.

A) 1	B) 3
C) 5	D) 7

Answer & Explanation Answer: B) 3

Explanation:

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Filed Under: Simplification
Exam Prep: Bank Exams

1 45986

Q:

x and y are integers

x + y < 11 , and x > 6

What is the smallest possible value of x - y ?

A) 1	B) 24
C) 4	D) -2

Answer & Explanation Answer: C) 4

Explanation:

The smallest value will be obtained by giving x the smallest possible value while y gets the largest possible value. The smallest value for x = 7. This means that y will have to be less than or equal to 3 (so that x + y <11), but we want the largest value of y which is 3.

The difference, x - y will be 4.

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Filed Under: Problems on Numbers
Exam Prep: GRE

4 45968

Q:

Simplify : $\frac{5}{28} \div \frac{28}{35} \div \frac{20}{112}$

A) 4/5	B) 5/4
C) 4/7	D) 7/4

Answer & Explanation Answer: B) 5/4

Explanation:

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Filed Under: Simplification
Exam Prep: Bank Exams

1 45966

Q:

Find the approximate value of ? in ${(14.998)}^{3} = ?$

A) 3573	B) 4096
C) 3378	D) 3374

Answer & Explanation Answer: D) 3374

Explanation:

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Filed Under: Simplification
Exam Prep: Bank Exams

3 45738

Q:

Pick the odd man out of the folowing number sequence?

123 112 133 112 143

A) 143	B) 122
C) 133	D) 112

Answer & Explanation Answer: B) 122

Explanation:

Here the given series is 123 112 133 112 143

It follows a pattern that,

123

123 - 11 = 112

112 + 21 = 133

133 - 31 = 102 (not 122)

102 + 41 = 143

Hence, the odd man in the given number sequence is 122 instead of 102.

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Filed Under: Odd Man Out
Exam Prep: AIEEE , Bank Exams , CAT , GATE
Job Role: Analyst , Bank Clerk , Bank PO

4 45736

Q:

An error 2% in excess is made while measuring the side of a square. The percentage of error in the calculated area of the square is:

A) 1.04	B) 2.04
C) 3.04	D) 4.04

Answer & Explanation Answer: D) 4.04

Explanation:

100 cm is read as 102 cm.

A1 = (100*100)Sq.cm

A2 = (102*102)Sq.cm

(A2 - A1) = $102^{2} - 100^{2}$ = (102 + 100) x (102 - 100) = 404 sq.cm.

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Filed Under: Area
Exam Prep: Bank Exams
Job Role: Bank PO

40 45733

Quantitative Aptitude - Arithmetic Ability Questions

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