Question : Directions: After interchanging the given two numbers and two signs what will be the values of equations (I) and (II) respectively?
+ and ×, 5 and 4
I. 4 + 6 × 5 – 7 ÷ 1
II. 5 × 3 – 4 + 8 ÷ 2
Option 1: –9, –8
Option 2: 30, –13
Option 3: 20, 6
Option 4: 27, –13
Correct Answer: 27, –13
Solution :
Given:
I. 4 + 6 × 5 – 7 ÷ 1
II. 5 × 3 – 4 + 8 ÷ 2
After interchanging the numbers and signs in the given equations, the equations become –
I. 5 × 6 + 4 – 7 ÷ 1
= 5 × 6 + 4 – 7
= 30 + 4 – 7
=
27
II. 4 + 3 – 5 × 8 ÷ 2
= 4 + 3 – 5 × 4
= 4 + 3 – 20
= –13
So, 27 and –13 are the required answers to the given equations. Hence, the fourth option is correct.
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