Question : Directions: Which two signs should be interchanged to make the given equation correct?
171 ÷ 3 – 16 + 72 × 412 = 572
Option 1: × and –
Option 2: ÷ and –
Option 3: + and ÷
Option 4: – and +
Correct Answer: × and –
Solution :
Given:
171 ÷ 3 – 16 + 72 × 412 = 572
Replace the given symbols in the options one by one with the original symbols in the given equation.
First option:
× and –
= 171 ÷ 3 × 16 + 72 – 412
= 57 × 16 + 72 – 412
= 912 + 72 – 412
= 984 – 412
= 572
Second option:
÷ and –
= 171 – 3 ÷ 16 + 72 × 412
= 171 – 0.1875 + 72 × 412
= 171 – 0.1875 + 29664
= 29835 – 0.1875
= 29834.8125
≠
572
Third option:
+ and ÷
= 171 + 3 – 16 ÷ 72 × 412
= 171 + 3 – 0.22 × 412
= 171 + 3 – 90.64
= 174 – 90.64
= 83.36
≠
572
Fourth option:
– and +
= 171 ÷ 3 + 16 – 72 × 412
= 57 + 16 – 72 × 412
= 57 + 16 – 29664
= 73 – 29664
= –29591
≠
572
Here, only the first option satisfies the R.H.S. of the given equation. Hence, the first option is correct.
Related Questions
Know More about
Staff Selection Commission Combined Grad ...
Result | Eligibility | Application | Selection Process | Preparation Tips | Admit Card | Answer Key
Get Updates Brochure
Your Staff Selection Commission Combined Graduate Level Exam brochure has been successfully mailed to your registered email id “”.
