Question

If the signs + and × are interchanged, then which of the following equations would be correct?

Options

• 18 × 3 + 12 + 8 = 20

• 10 × 5 + 10 + 10 = 10

• 9 × 3 - 7 + 9 = 19

• 4 + 8 + 63 = 8

Answer 1

18 × 3 + 12 + 8 = 20

Explanation - 

(+) ↔ (×)

From option (1),

18 × 3 +12 + 8 = 20

⇒ 18 + 3 + 12 × 8 = 20

⇒ 18 + `1/4` × 8 = 20 ⇒ 18 + 2 = 20 

⇒  20 = 20