If '+' means '–' , '–' means '×' , '×' means '÷' and '÷' means '+', then what will come in place of (?) in the given equation?
30 + 5 – 2 × 10 ÷ 2 = ?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 31.
Given conditions: '+' means '–' , '–' means '×' , '×' means '÷' and '÷' means '+':
Given equation: 30 + 5 – 2 × 10 ÷ 2 = ?
After interchanging the expression becomes:
= 30 – 5 × 2 ÷ 10 + 2
= 30 – 1 + 2
= 32 – 1
= 31