6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

A shopkeeper cheats to the extent of 10% while buying and selling, by using false weights. His total gain is.

A) 20%	B) 21%
C) 22%	D) 23%

Answer & Explanation Answer: B) 21%

Explanation:

Gain % = $(\frac{{(100 + c o m m o n g a i n %)}^{2}}{100} - 100)$ %

= $(\frac{{(100 + 10)}^{2}}{100} - 100)$

= 21%

Report Error

View Answer Report Error Discuss

Filed Under: Profit and Loss

584 107687

Q:

$23 - [24 - 25 - (26 - \bar{27 - 28})] = ?$

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

Answer & Explanation Answer: C) -1

Explanation:

Report Error

View Answer Report Error Discuss

Filed Under: Simplification
Exam Prep: Bank Exams

18 107638

Q:

What should come in place of question mark (?) in the following question?

1234 + 2345 – 3456 + 4567 = ?

A) 4590	B) 4680
C) 4670	D) 4690

Answer & Explanation Answer: D) 4690

Explanation:

As per the BODMAS rule, the priority in which the operations should be done is:

Priority wise operations	Symbol
B-Bracket	()
O-of	of
D-Division	/,÷
M-Multiplication	*,x
A-Addition	+
S-Subtraction	-

Note: Addition and subtraction can be treated on same priority (from left to right) when they are in consecutive order. ? = 1234 + 2345 – 3456 + 4567 ? = 3579 - 3456 + 4567 ? = 123 + 4567 ? = 4690

Report Error

View Answer Report Error Discuss

Filed Under: Simplification

0 107334

Q:

What will come in place of question mark (?) in the following number series?

4, 3, 4, 7, 15, ?

A) 42	B) 44
C) 53	D) 56

Answer & Explanation Answer: B) 44

Explanation:

4 3 4 7 15 ?
×1-1 ×1+1 ×2-1 ×2+1 ×3-1

15x3 - 1 = 45 - 1 = 44

Report Error

View Answer Report Error Discuss

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

8 107284

Q:

Find the next number in the series 125, 80, 45, 20, ....

A) 5	B) 15
C) -5	D) 10

Answer & Explanation Answer: A) 5

Explanation:

The pattern is -45, -35, -25, -15

The next number = 20-15= 5

Report Error

View Answer Report Error Discuss

Filed Under: Numbers
Exam Prep: Bank Exams , CAT
Job Role: Bank Clerk

44 106030

Q:

In the following number series only one number is wrong. Find out the wrong number ?

6, 15, 35, 63, 143, 221, 323

A) 143	B) 63
C) 323	D) 35

Answer & Explanation Answer: B) 63

Explanation:

Here the series follows the pattern that, product of succesive prime numbers i.e,

2 × 3 = 6

3 × 5 = 15

5 × 7 = 35

7 × 11 = 77

11 × 13 = 143

13 × 17 = 221

17 × 19 = 323

So here in place of 77 the number 63 is written.

So the wrong number is 63.

Report Error

View Answer Report Error Discuss

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

7 105830

Q:

The radius of base of a right circular cone is 6cm and its slant height is 10cm. Then its volume is

$(u s e π = \frac{22}{7})$

A) 301.71 cm3	B) 310.71 cm3
C) 301.17 cm3	D) 310.17 cm3

Answer & Explanation Answer: A) 301.71 cm3

Explanation:

Report Error

View Answer Report Error Discuss

Filed Under: Simplification
Exam Prep: Bank Exams

0 105126

Q:

What is the rate of interest p.c.p.a.?

I. An amount doubles itself in 5 years on simple interest.

II. Difference between the compound interest and the simple interest earned on a certain amount in 2 years is Rs. 400.

III. Simple interest earned per annum is Rs. 2000

A) I only	B) II and III only
C) All I, II and III	D) I only or II and III only

Answer & Explanation Answer: D) I only or II and III only

Explanation:

$I . \frac{P * R * 5}{100} = P \Leftrightarrow R = 20$

$I I . P {(1 + \frac{R}{100})}^{2} - P - \frac{P * R * 2}{100} = 400 = > p R^{2} = 4000000$

$I I I . \frac{P * R * 1}{100} = 2000 = > P R = 200000$

$\frac{P R^{2}}{P R} = \frac{4000000}{200000} \Leftrightarrow R = 20$

Thus I only or (II and III) give answer.

Correct answer is (D)

Report Error

View Answer Report Error Discuss

Filed Under: Compound Interest
Exam Prep: Bank Exams
Job Role: Bank PO

94 104391

Quantitative Aptitude - Arithmetic Ability Questions

Quick Links