Q:

By interchanging the given two signs and numbers which of the following equation will be correct?
 × and ÷, 7 and 9

• 1
  9 – 7 × 2 + 6 ÷ 3 = 11
• 2
  9 + 4 × 3 – 7 ÷ 1 = 40
• 3
  8 × 3 ÷ 6 + 9 – 7 = 14
• 4
  9 × 3 + 4 ÷ 2 – 7 = 18