Mathematical Operations Questions

Q:

In the following question, correct the equation by interchanging the two signs.
6 ÷ 17 x 51 + 6 – 12 = – 4

A) x and ÷ B) + and ÷
C) + and – D) – and ÷
 
Answer & Explanation Answer: A) x and ÷

Explanation:
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2 1505
Q:

1/2 - 1/8 =

A) 1/2 B) 3/8
C) 2/3 D) 3/2
 
Answer & Explanation Answer: B) 3/8

Explanation:

Now to find the difference in the given fractions, 1/2 - 1/8

First take the LCM of 2 & 8

LCM of 2 & 8 is 8

Then,

1/2 - 1/8

= (4 - 1)/8

= 3/8

 

Hence, 1/2 - 1/8 = 3/8.

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11 1468
Q:

In the following question, by using which mathematical operator will the expression become correct?
18 ? 6 ? 9 ? 27

A) x, ÷ and = B) ÷, x and =
C) x, + and = D) +, – and =
 
Answer & Explanation Answer: B) ÷, x and =

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2 1461
Q:

Find the missing number?

A) 120 B) 23
C) 55 D) 30
 
Answer & Explanation Answer: B) 23

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5 1428
Q:

In a certain code language, '÷' represents '+', '-' represents 'x', '+' represents '÷' and 'x' represents '-'. Find out the answer to the followingquestion. 8 ÷ 14 - 20 + 5 x 2 = ?

A) 46 B) 62
C) 32 D) 14
 
Answer & Explanation Answer: B) 62

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5 1420
Q:

Find the missing number from the alternatives.

A) 125 B) 175
C) 225 D) 250
 
Answer & Explanation Answer: C) 225

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14 1414
Q:

If 17 + 17 = 2895 18 + 18 = 3245 19 + 19 = 3615 then 23 + 23 = ?

A) 5765 B) 2565
C) 4005 D) 5295
 
Answer & Explanation Answer: D) 5295

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15 1413
Q:

Find the missing number?

A) 11 B) 31
C) 32 D) 37
 
Answer & Explanation Answer: B) 31

Explanation:
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10 1317