If '×' = '-', '-' = '+', '/' = '×', '+' = '', which equation is correct?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 20 - 4 + 8 / 2 × 1 = 20.
Option 4: 20 - 4 + 8 / 2 × 1 = 20
On interchanging the sign:
20 + 4 8 × 2 - 1 = 20
20 + 1 - 1 = 20
21 - 1 = 20
20 = 20