Mathematical Operations Reasoning Questions with Examples

Practice Questions of Mathematical Operations:

Directions (1-5). Study the nature of signs carefully and determine the value of given equations.

1. If ‘+’ means ‘divided by’, ‘–‘ means ‘added to’, ‘×’ means ‘subtracted from’ and ‘÷’ means ‘multiplied by’, then what is the value of 15 ÷ 12 – 36 + 3 ?

(A) 180

(B) 195

(C) 192

(D) 200

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2. If ‘+’ stands for ‘×’, ‘–‘ for ‘÷’, ‘×’ for ‘–‘ and ‘÷’ for ‘+’, find the value of 12 + 90 – 5 × 9 ÷ 3.

(A) 210

(B) 216

(C) 215

(D) 120

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Direction: In the following question, the equations have become wrong because of the wrong order of signs. Choose the correct order of signs from the four options given below, so as to make the equations right.

3. 17 – 3 × 6 = 45.

(A) ×, =, –

(B) ×, –, =

(C) –, ×, =

(D) =, –, ×

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4. 40 – 45 × 5 = 1

(A) –, ×, =

(B) =, ×, – 

(C) ×, =, – 

(D) =, –, × 

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5. 10 ÷ 2 = 6 – 14 

(A) =, ×, – 

(B) –, ×, =

(C) =, –, × 

(D) ×, –, =

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6. 34 × 2 ÷ 10 = 7

(A) +, ÷, =

(B) ÷, =, +

(C) +, =, ÷

(D) =, +, ÷ 

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7. 8 – 2 = 10 ÷ 6

(A) =, –, ÷ 

(B) ÷, =, – 

(C) ÷, –, =

(D) –, ÷, = 

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Direction: In each of the following questions, the given equation becomes correct due to the interchange of two signs. One of the four options under it specifies the interchange of signs in the equation which when made will make the equation correct. Find the correct option.

8. 5 + 6 ÷ 3 – 12 × 2 = 17.

(A) ÷ and ×

(B) + and ×

(C) + and ÷ 

(D) + and –

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9. 2 × 3 + 6 – 12 ÷ 4 = 17.

(A) × and +

(B) ÷ and – 

(C) + and ÷

(D) – and ÷ 

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10. 16 – 8 ÷ 4 + 5 × 2 = 8

(A) ÷ and ×

(B) – and ÷ 

(C) ÷ and ×

(D) – and × 

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