If + means - , - means × , × means ÷ , ÷ means +, what will come in place of the question mark (?) in the given equation?
180 × 60 - 30 ÷ 30 + 20 = ?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 100.
180 × 60 - 30 ÷ 30 + 20 = ?
After interchanging signs,
⇒(180 ÷ 60) × 30 + 30 - 20
⇒(3 × 30) + 30 - 20
⇒90 + 30 - 20
⇒100