Question

Which two signs should be interchanged to make the given equation correct?

7 × 96 ÷ 8 + 39 - 25 = 70

• A. × and ÷
• B. + and -
• C. + and ÷
• D. × and -

Answer 1

Answer:

B. + and -

Solution: The given equation: 7 × 96 ÷ 8 + 39 - 25 = 70 1) × and ÷ On interchanging × and ÷, we get: 7 ÷ 96 × 8 + 39 - 25 ⇒ 7 ÷ 12 + 14 ≠ 70 (incorrect) 2) + and - On interchanging + and -, we get: 7 × 96 ÷ 8 - 39 + 25 = 70 ⇒ 84 - 14 = 70 (correct) 3) + and ÷ On interchanging + and ÷, we get: 7 × 96 + 8 ÷ 39 - 25 ⇒ 672 + 0.2 - 25 ≠ 70 (incorrect) 4) × and - On interchanging × and -, we get: 7 - 96 ÷ 8 + 39 × 25 ⇒ 7 - 12 + 975 ≠ 70 (incorrect) Hence, we need to interchange + and - to make the equation correct.