Question : Directions: After interchanging the given two signs what will be the values of equation (I) and (II) respectively?
× and –
I. 18 × 8 – 6 ÷ 3 + 4
II. 7 – 8 × 4 ÷ 2 + 15
Option 1: 89 and 6
Option 2: 6 and 69
Option 3: 18 and 10
Option 4: -8 and 10
Correct Answer: 6 and 69
Solution :
Given:
I. 18 × 8 – 6 ÷ 3 + 4
II. 7 – 8 × 4 ÷ 2 + 15
Equation I:
18 × 8 – 6 ÷ 3 + 4
On interchanging the mathematical signs, we get –
= 18 – 8 × 6 ÷ 3 + 4
= 18 – 8 × 2 + 4
= 18 – 16 + 4
= 6
Equation II:
7 – 8 × 4 ÷ 2 + 15
On interchanging the mathematical signs, we get –
= 7 × 8 – 4 ÷ 2 + 15
= 7 × 8 – 2 + 15
= 56 – 2 + 15
= 69
So, the values are 6 and 69. Hence, the second option is correct.
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