Which two signs should be interchanged to make the given equation correct?
42 + 6 - 5 × 3 ÷ 9 = 1
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. + and ÷.
Given: 42 + 6 - 5 × 3 ÷ 9 = 1
From option 4, by interchanging signs + and ÷, we get
(42 ÷ 6) - 5 × 3 + 9 = 1
⇒ 7 - (5 × 3) + 9 = 1
⇒ 7 - 15 + 9 = 1
⇒ 1 = 1
Hence, the correct answer is + and ÷.