By interchanging the given two signs and numbers which of the following equation will be not correct?
÷ and ×, 1 and 3
A. 6 ÷ 3 – 1 + 4 × 2 = 5
B. 4 × 3 – 1 + 8 ÷ 2 = 9
C. 5 – 8 × 3 + 9 ÷ 1 = 24
D. 6 + 4 – 9 × 3 ÷ 1 = –17
Sol:
Interchange and check with option 1
Given in option 1
6 ÷ 3 – 1 + 4 × 2 = 6 × 1 – 3 + 4 ÷ 2 = 6 – 3 +2 = 5 Correct
Interchange and check with option 2
Given in option 2
4 × 3 – 1 + 8 ÷ 2 = 9
Interchanging ÷ and ×, 1 and 3
4 ÷ 1 – 3 + 8 × 2 = 4 – 3 + 16 = 17 Not correct.
