| Question | Which two signs need to be interchanged to make the following equation correct? 72 18 ÷ 9 + 19 − 39 = 16 | |
| Type | multiple_choice | |
| Option | − and × | incorrect |
| Option | + and × | incorrect |
| Option | − and + | incorrect |
| Option | ÷ and × | correct |
| Solution | ÷ and × Given equation: 72 × 18 ÷ 9 + 19 − 39 = 16 After interchanging the symbols in given equation the equation is as follows : 72 ÷ 18 × 9 + 19 – 39 = 16 ⇒ 72 ÷ 18 × 9 + 19 – 39 = 16 ⇒ 4 × 9 + 19 – 39 = 16 ⇒ 36 + 19 – 39 = 16 ⇒ 55 – 39 = 16 ⇒ 16 = 16 LHS = RHS | |
