49+ Mathematical Operations Questions and Answers With Explanation

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

Answer & Explanation Answer: A) 40 – 10 + 5 ÷ 4 x 5 = 21

Explanation:

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18 2339

Q:

Select the missing number from the given responses.

A) 45	B) 65
C) 70	D) 80

Answer & Explanation Answer: B) 65

Explanation:

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33 2338

Q:

In the following question, correct the equation by interchanging two signs.
6 + 8 ÷ 4 – 4 = 8

A) ÷ and =	B) ÷ and +
C) ÷ and –	D) + and –

Answer & Explanation Answer: D) + and –

Explanation:

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5 2198

Q:

What is x squared plus x squared?

A) 4x	B) 2x^2
C) x^4	D) 2x

Answer & Explanation Answer: B) 2x^2

Explanation:

In an algebraic expression, like terms are terms that contain the same variables raised to the same powers. Calculating x-squared plus x-squared is a matter of combining like terms.

Now x^2 + x^2 = 2x^2

Hence, x-squared plus x-squared is equal to 2 times x squared.

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8 2156

Q:

5068 / 37 x 4 = ?

A) 548	B) 625
C) 214	D) 745

Answer & Explanation Answer: A) 548

Explanation:

? = 5068 x 4/37

? = 548

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20 2128

Q:

3 x 3 + 3 - 3 + 3 = ?

A) 9	B) 12
C) -3	D) 3

Answer & Explanation Answer: B) 12

Explanation:

Using BODMAS law,

3 x 3 + 3 - 3 + 3 =

3 x 3 = 12

= 12 + 3 - 3 + 3

= 9 + 3

= 12

Hence, 3 x 3 + 3 - 3 + 3 = 12.

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19 2050

Q:

Can you Solve $7 + 7 \div 7 + 7 x 7 + 7 - 7 \div 7 + 7 x 7$ =

A) 112	B) 56
C) 0	D) 98

Answer & Explanation Answer: A) 112

Explanation:

$7 + 7 \div 7 + 7 x 7 + 7 - 7 \div 7 + 7 x 7 = 7 + 1 + 49 + 7 - 1 + 49 = 8 + 56 + 48 = 56 + 56 = 112$

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22 2042

Q:

The following equation is incorrect. Which two signs should be interchanged to correct the equation? 15 x 12 + 40 ÷ 40 - 6 = 21

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

Mathematical Operations Questions

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