49+ Mathematical Operations Questions and Answers With Explanation

Q:

The following equation is incorrect. Which two signs should be interchanged to correct the equation?

1 ÷ 14 x 30 + 20 - 10 = 12

A) - and +	B) ÷ and x
C) x and -	D) + and ÷

Answer & Explanation Answer: D) + and ÷

Explanation:

Report Error

View Answer Report Error Discuss

Filed Under: Mathematical Operations
Exam Prep: Bank Exams

15 13224

Q:

The following equation is incorrect. Which two signs should be interchanged to correct the equation?

10 x 4 + 5 - 30 ÷ 6 = 31

A) x and -	B) ÷ and -
C) + and ÷	D) - and +

Answer & Explanation Answer: A) x and -

Explanation:

Report Error

View Answer Report Error Discuss

Filed Under: Mathematical Operations
Exam Prep: Bank Exams

6 12732

Q:

If "#" means "subtraction", "&" means "division", "@" means "addition" and "%" means "multiplication" then

516 & 6 # 11 @ 50 % 4 = ?

A) 210	B) 274
C) 250	D) 275

Answer & Explanation Answer: D) 275

Explanation:

Report Error

View Answer Report Error Discuss

Filed Under: Mathematical Operations
Exam Prep: Bank Exams

15 11252

Q:

In a certain code language, '-' represents 'x', '÷' represents '+', '+' represents '÷' and 'x' represents '-'. Find out the answer to the following question.19 ÷ 2 - 35 + 10 x 6 = ?

A) 20	B) 14
C) 32	D) 16

Answer & Explanation Answer: A) 20

Explanation:

Report Error

View Answer Report Error Discuss

Filed Under: Mathematical Operations

17 7406

Q:

A sum of Rs.1890 has to be used to give 9 prizes to the customers of a super market for their overall academic purchases. If each prize is Rs.30 less than its preceding price, what is the least value of the price ?

A) 90	B) 95
C) 85	D) 80

Answer & Explanation Answer: A) 90

Explanation:

Let the least value of the prize = Rs. x

Then the next value of the prize is x+30 , x+60, x+90, ....x+240.

Given total amount of cash prizes = Rs.1890

--> x + (x+30) + (x+60) + (x+90) + ....+ (x+240) = 1890

--> 9x + (30 + 60 + 90 + 120 + 150 + 180 + 210 + 240) = 1890

--> 9x + 30(1 + 2 + 3 + 4....+ 8) = 1890

--> 9x + 30(36) = 1890

--> 9x = 810 --> x=90

Hence the least value of the prize x=90

Report Error

View Answer Report Error Discuss

Filed Under: Mathematical Operations
Exam Prep: CAT , Bank Exams
Job Role: Bank PO , Bank Clerk

29 6799

Q:

The last two digits of $2151^{415}$ ?

A) 81	B) 61
C) 91	D) 51

Answer & Explanation Answer: D) 51

Explanation:

Unit digit of this expression is always 1 as the base ends with 1.

For the tenth place digit we need to multiply the digit in the tenth place of the base and unit digit of the power and take its unit digit.

i.e, tenth place digit in 2151 is 5 and

tenth place digit in power 415 is 1

And the units digit in the product of 5 x 1 = 5

Therefore, last two digits of $2151^{415}$ is 51.

Report Error

View Answer Report Error Discuss

Filed Under: Mathematical Operations
Exam Prep: AIEEE , Bank Exams , CAT , GATE
Job Role: Bank Clerk , Bank PO

23 6009

Q:

If × means ÷, - means ×, ÷ means + and + means- than (3 - 15 ÷ 19) × 8 + 6 = ?

A) 8	B) 4
C) 2	D) -1

Answer & Explanation Answer: C) 2

Explanation:

By the given data, we have the expression :

(3 × 15 + 19) ÷ 8 - 6 = (45 + 19) ÷ 8 - 6 = 64 ÷ 8 - 6 = 8 - 6 = 2

Report Error

View Answer Report Error Discuss

Filed Under: Mathematical Operations

107 4454

Q:

If "–" stands for "÷", "+"stands for "x", "÷" for "–" and "x" for "+", which of the following equations is correct?

A) 40 – 10 + 5 ÷ 4 x 5 = 21	B) 40 + 10 – 4 x 5 ÷ 3 = 80
C) 40 ÷ 10 – 4 x 5 + 3 = 32	D) 8 – 4 x 40 ÷ 2 + 15 = 30

Mathematical Operations Questions

Quick Links