Q:

By interchanging the given two signs and numbers which of the following equation will be correct?
 + and ×, 1 and 2

• 1
  8 × 3 – 4 ÷ 2 + 1 = 7
• 2
  2 × 3 – 8 ÷ 1 + 9 = 18
• 3
  8 × 3 – 4 ÷ 2 + 1 = 3
• 4
  2 × 3 – 8 ÷ 1 + 2 = 5