Question

Select the correct combination of mathematical signs that can sequentially replace the *signs and balance the equation.

36 * 14 * 63 * 9 * 11 * (6 * 3) * 90

1. -, +, ÷, ×, -, +, =
2. -, +, ÷, ×, =, -, +
3. -, +, ×, ÷, -, +, =
4. +, -, ÷, ×, =, -, +

Answer 1

Correct Answer - Option 1 : -, +, ÷, ×, -, +, =

Given: 36 * 14 * 63 * 9 * 11 * (6 * 3) * 90

By substituting the signs option wise:

(1) -, +, ÷, ×, -, +, = → 36 - 14 + 63 ÷ 9 × 11 - (6 + 3) = 90

LHS = 36 - 14 + 63 ÷ 9 × 11 - (6 + 3)

= 22 + 77 - 9

= 99 - 9

= 90 

LHS = RHS

(2) -, +, ÷, ×, =, -, + → 36 - 14 + 63 ÷ 9 × 11 = (6 - 3) + 90

LSH = 36 - 14 + 63 ÷ 9 × 11

= 22 + 77

= 99

RHS = (6 - 3) + 90

= 3 + 90 

= 93

LHS ≠ RHS

(3) -, +, ×, ÷, -, +, = → 36 - 14 + 63 × 9 ÷ 11 - (6 + 3) = 90

LHS = 36 - 14 + 63 × 9 ÷ 11 - (6 + 3)

= 22 + 567 ÷ 11 - 9

= 22 + 51.54 - 9 

= 64.54

≠ 90

LHS ≠ RHS

(4) +, -, ÷, ×, =, -, + → 36 + 14 - 63 ÷ 9 × 11 = (6 - 3) + 90

LHS = 36 + 14 - 63 ÷ 9 × 11

= 50 - 77 

= - 27

RHS = (6 - 3) + 90

= 3 + 90

= 93

LSH ≠ RHS

Hence, -, +, ÷, ×, -, +, = is the correct answer.