Question : Directions: By interchanging the given two signs and numbers which of the following equations will be not correct?
+ and –, 3 and 5
Option 1: 5 × 4 + 3 – 6 ÷ 2 = 10
Option 2: 7 × 4 ÷ 2 – 5 + 3 = 12
Option 3: 5 × 4 – 3 + 4 ÷ 2 = 15
Option 4: 5 – 3 + 8 × 4 ÷ 2 = 10
Latest: SSC CGL preparation tips to crack the exam
Don't Miss: SSC CGL complete guide
Correct Answer: 5 – 3 + 8 × 4 ÷ 2 = 10
Solution :
Given:
+ and –, 3 and 5
Replace the given symbols and numbers in the options one by one with the original symbols and numbers in the given equation.
First option:
5 × 4 + 3 – 6 ÷ 2 = 10
3 × 4 – 5 + 6 ÷ 2
= 3 × 4 – 5 + 3
= 12 – 5 + 3
= 12 – 2
= 10
Second option:
7 × 4 ÷ 2 – 5 + 3 = 12
7 × 4 ÷ 2 + 3 – 5
= 7 × 2 + 3 – 5
= 14 + 3 – 5
= 14 – 2
= 12 = R.H.S
Third option:
5 × 4 – 3 + 4 ÷ 2 = 15
3 × 4 + 5 – 4 ÷ 2
= 3 × 4 + 5 – 2
= 12 + 5 – 2
= 12 + 3
= 15
Fourth option:
5 – 3 + 8 × 4 ÷ 2 = 10
3 + 5 – 8 × 4 ÷ 2
= 3 + 5 – 8 × 2
= 3 + 5 – 16
= 3 – 11
= – 8 ≠ 10
Here, only the fourth option does not satisfy the R.H.S. of the given equation. Hence, the fourth option is correct.
Related Questions
Know More about
Staff Selection Commission Combined Grad ...
Answer Key | Eligibility | Application | Selection Process | Preparation Tips | Result | Admit Card
Get Updates Brochure
Your Staff Selection Commission Combined Graduate Level Exam brochure has been successfully mailed to your registered email id “”.
