Rajasthan Police Constable Model Paper 9

1) + and -
Given statement: 11 -2 + 6 ÷ 3 × 4 = 20On interchanging the above signs,
11 + 2 - 6 ÷ 3 × 4
= 11 + 2 - 2 × 4

= 11 + 2 - 8
= 13 -8
= 5 ≠ 20
2) - and ÷
Given statement: 11 -2 + 6 ÷ 3 × 4 = 20
On interchanging the above signs,
11 ÷ 2 + 6 - 3 × 4
= 5.5 + 6 - 3 × 4
= 5.5 + 6 -12
= 11.5 -12
= -0.5 ≠ 20
3) × and -
Given statement: 11 -2 + 6 ÷ 3 × 4 = 20
On interchanging the above signs,
11 × 2 + 6 ÷ 3 -4
= 11 × 2 + 2 -4
= 22 + 2 -4
= 24 - 4
= 20
4) × and +
Given statement: 11 -2 + 6 ÷ 3 × 4 = 20
On interchanging the above signs,
11 - 2 × 6 ÷ 3 + 4
= 11 - 2 × 2 + 4
= 11 -4 + 4
= 15 -4
= 11 ≠ 20
Hence, ‘× and - ’ is the correct answer.