Rajasthan Police Constable Model Paper 8

But putting the operations in place of question mark and using BODMAS rule,
Option 1 → ÷ , + , × and –
21 ÷ 18 + 16 × 2 – 22 = 143
1.16 + 16 × 2 – 22 = 143
1.16 + 32 – 22 = 143
33.16 – 22 = 143
11.16 ≠ 143
Option 2 →–, + , × and ÷
21 – 18 + 16 × 2 ÷ 22 = 143
21 – 18 + 16 × 0.09 = 143
21 – 18 + 1.54 = 143
22.54 – 18 = 1434.54 ≠ 143
Option 3 → –, × , ÷ and +
21 – 18 × 16 ÷ 2 + 22 = 143
21 – 18 × 8 + 22 = 143
21 – 144 + 22 = 143
43 – 144 = 143
– 101 ≠ 143
Option 4 → + , × , ÷ and –
21 + 18 × 16 ÷ 2 – 22 = 143
21 + 18 × 8 – 22 = 143
21 + 144 – 22 = 143
165 – 22 = 143
143 = 143
Hence, option 4 is the correct answer.