If signs ‘+’ and ‘–’ and numbers 4 and 12 interchange between each other, then which one of the following four equation would be correct ?
Answer & explanation
Correct answer: option 3
Option (1)
⇒ 4 - 8 ÷ 12 = 16
12 + 8 ÷ 4 = 12 + 2 = 14 ≠ 16
Option (2)
⇒ 8 - 4 ÷ 12 = 2.3
8 + 12 ÷ 4 = 11 ≠ 2.3
Option (3)
⇒ 4 ÷ 8 - 12 = 5.5
12 ÷ 8 + 4 = 1.5 + 4 = 5.5
Option (4)
⇒ 8 ÷ 4 - 12 = 3.6
8 ÷ 12 + 4 = 0.66 + 4 = 4.66
So, option 3 is correct.