Q:

If ‘-’ stands for ‘division’, ‘+’ for ‘multiplication’, ‘÷’ for ‘subtraction’ and ‘×’ for ‘addition’, which one of the following equations is correct? 

• 1
  6 + 20 – 12 ÷ 7 – 1 = 38
• 2
  6 – 20 ÷ 12 × 7 + 1 = 57
• 3
  6 + 20 – 12 ÷ 7 × 1 = 62
• 4
  6 ÷ 20 × 12 + 7 – 1 = 70