Which two signs should be interchanged to make the given equation correct?
729 × 9 – (56 – 6) × 5 ÷ 2 + 152 × 19 = 69
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e, × and ÷.
Given Equation : 729 × 9 – (56 – 6) × 5 ÷ 2 + 152 × 19 = 69
After the interchanging the signs in Option 2 the equation is satisfied:
729 ÷ 9 – (56 – 6) ÷ 5 x 2 + 152 ÷ 19 = 69 ( Using BODMAS)
729 ÷ 9 - 50 ÷ 5 x 2 + 152 ÷ 19 = 69
81 - 10 x 2 + 8 = 69
81 - 20 + 8 = 69
89 - 20 = 69
69 = 69
Thus , LHS = RHS
Hence, × and ÷ is the correct answer.