6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

What day would it be on 1 September 2020?

A) Tuesday	B) Wednesday
C) Thursday	D) Friday

Answer & Explanation Answer: A) Tuesday

Explanation:

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Filed Under: Calendar
Exam Prep: Bank Exams

77 36482

Q:

The average salary of all the workers in a workshop is Rs. 8000. The average salary of 7 technicians is Rs. 12000 and the average salary of the rest is Rs. 6000. The total number of workers in the workshop is :

A) 20	B) 21
C) 23	D) 24

Answer & Explanation Answer: B) 21

Explanation:

Lot the total number of workers be v Then,

8OOOv = (12000 * 7) + 6000 (v - 7) <=> 2000v = 42000 <=> v = 21.

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Filed Under: Average

65 36472

Q:

Find the total surface area (in cm2) of a hemisphere of diameter 21 cm.

A) 1039.5	B) 844.5
C) 637	D) 472

Answer & Explanation Answer: A) 1039.5

Explanation:

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Filed Under: Volume and Surface Area
Exam Prep: Bank Exams

2 36416

Q:

Selling price of an article is Rs 2397 and discount offered is 15%. What is the marked price (in Rs)?

A) 2756.5	B) 2856.6
C) 2740	D) 2820

Answer & Explanation Answer: D) 2820

Explanation:

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Filed Under: Percentage
Exam Prep: Bank Exams

10 36404

Q:

The dimensions of a room are 10m x 7m x 5m. There are 2 doors and 3 windows in the room. The dimensions of the doors are 1m x 3m. One window is of size 2m x 1.5m and the other 2 windows are of size 1m x 1.5m. The cost of painting the walls at Rs. 3 per sq m is

A) Rs.174	B) Rs.274
C) Rs.374	D) Rs.474

Answer & Explanation Answer: D) Rs.474

Explanation:

Area of 4 walls = 2(l+b)h
=2(10+7) x 5 = 170 sq m
Area of 2 doors and 3 windows = 2(1x3)+(2x1.5)+2(1x1.5) = 12 sq m
area to be planted = 170 -12 = 158 sq m

Cost of painting = Rs. 158 x 3 = Rs. 474

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

37 36378

Q:

Choose the figure which is different from the rest three.

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

Answer & Explanation Answer: B) 3

Explanation:

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Filed Under: Odd Man Out
Exam Prep: Bank Exams

0 36373

Q:

Four dice are thrown simultaneously. Find the probability that all of them show the same face.

A) 1/216	B) 1/36
C) 2/216	D) 4/216

Answer & Explanation Answer: A) 1/216

Explanation:

The total number of elementary events associated to the random experiments of throwing four dice simultaneously is:

= $6 * 6 * 6 * 6 = 6^{4}$

n(S) = $6^{4}$

Let X be the event that all dice show the same face.

X = { (1,1,1,1,), (2,2,2,2), (3,3,3,3), (4,4,4,4), (5,5,5,5), (6,6,6,6)}

n(X) = 6

Hence required probability = $\frac{n (X)}{n (S)} = \frac{6}{6^{4}}$ = $\frac{1}{216}$

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Filed Under: Probability

48 36265

Q:

Find the ratio in which rice at Rs. 7.20 a kg be mixed with rice at Rs. 5.70 a kg to produce a mixture worth Rs. 6.30 a kg.

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

Answer & Explanation Answer: B) 2:3

Explanation:

By the rule of alligation:
Cost of 1 kg rice of 1st kind Cost of 1 kg rice of 2nd kind

Quantitative Aptitude - Arithmetic Ability Questions

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