Question

In the following question, by using which mathematical operators will the expression becomes correct?

20_21_7_6 = 17

• A. +, -, ÷
• B. ÷, -, +
• C. -, +. ÷
• D. +, ÷, -

Answer 1

Answer:

D. +, ÷, -

Using BODMAS rule, 1) +, -, ÷ ⇒ 20 + 21 - 7 ÷ 6 = 39.8333 2) ÷, -, + ⇒ 20 ÷ 21 - 7 + 6 = -0.04761905 3) -, +, ÷ ⇒ 20 - 21 + 7 ÷ 6 = 0.166667 4) +, ÷, - ⇒ 20 + 21 ÷ 7 - 6 = 17 Hence, correct set of symbols is ‘+, ÷, -'