Question : Directions: After interchanging the given two numbers what will be the values of equations (I) and (II) respectively?
8 and 4
I. 8 – 4 × 6 ÷ 3 + 7
II. 8 × 3 – 6 ÷ 2 + 4
Option 1: –5 and 20
Option 2: –4 and 18
Option 3: –5 and 17
Option 4: 20 and 18
Correct Answer: –5 and 17
Solution :
Given:
I. 8 – 4 × 6 ÷ 3 + 7
II. 8 × 3 – 6 ÷ 2 + 4
On interchanging 8 and 4 in the above equations we get –
Equation I:
4 – 8 × 6 ÷ 3 + 7
= 4 – 8 × 2 + 7
= 4 – 16 + 7
= –5
Equation II:
4 × 3 – 6 ÷ 2 + 8
= 4 × 3 – 3 + 8
= 12 – 3 + 8
= 17
So, the values are –5 and 17 respectively for equations (I) and (II).
Hence, the
third option
is correct.
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