Question : Directions: After interchanging the given two numbers and two signs what will be the values of equations (I) and (II) respectively?
× and –, 4 and 5
I. 9 ÷ 3 × 6 + 5 – 4
II. 5 – 4 × 3 + 6 ÷ 2
Option 1: 17, 20
Option 2: 8, 6
Option 3: 16, 20
Option 4: 20, 17
Correct Answer: 17, 20
Solution :
Given:
I. 9 ÷ 3 × 6 + 5 – 4
II. 5 – 4 × 3 + 6 ÷ 2
Let's solve each equation after interchanging signs and numbers according to the instructions.
On interchanging the signs and numbers in the first equation, we get –
= 9 ÷ 3 – 6 + 4 × 5
= 3 – 6 + 4 × 5
= 3 – 6 + 20
= 23 – 6 = 17
On interchanging the signs and numbers in the second equation, we get –
= 4 × 5 – 3 + 6 ÷ 2
= 4 × 5 – 3 + 3
= 20 – 3 + 3 = 20
So, 17 and 20 are the required answers to the given equations. Hence, the first option is correct.
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