Question : Directions: After interchanging the given two numbers what will be the values of equations (I) and (II) respectively?
8 and 2
I. 3 + 6 – 8 × 4 ÷ 2
II. 12 ÷ 6 × 9 – 2 + 8
Option 1: 12 and 8
Option 2: 9 and 15
Option 3: 9 and 81
Option 4: 8 and 12
Correct Answer: 8 and 12
Solution :
Equation I.
3 + 6 – 8 × 4 ÷ 2
On interchanging the numbers, we get –
= 3 + 6 – 2 × 4 ÷ 8
= 3 + 6 – 2 × 0.5
= 3 + 6 – 1
= 9 – 1
= 8
Equation II.
12 ÷ 6 × 9 – 2 + 8
On interchanging the numbers, we get –
= 12 ÷ 6 × 9 – 8 + 2
= 2 × 9 – 8 + 2
= 18 – 8 + 2
= 20 – 8
= 12
So, the values are 8 and 12. Hence, the fourth option is correct.
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