Question : Directions: Which two signs should be interchanged to make the given equation correct?
68 ÷ 2 – 42 + 108 × 12 = 103
Option 1: = and –
Option 2: + and –
Option 3: ÷ and ×
Option 4: ÷ and +
Correct Answer: ÷ and ×
Solution :
Given:
68 ÷ 2 – 42 + 108 × 12 = 103
Replace the given symbols in the options one by one with the original symbols in the given equation.
First option:
= and –
68 ÷ 2 = 42 + 108 × 12 – 103
L.H.S.→68 ÷ 2 = 34
R.H.S.→42 + 108 × 12 – 103
= 42 + 1296 – 103
= 1235 ≠ 34
L.H.S. ≠ R.H.S.
Second option:
+ and –
L.H.S.→68 ÷ 2 + 42 – 108 × 12
= 34 + 42 – 108 × 12
= 34 + 42 – 1296
= –1220 ≠ 103
Third option:
÷ and ×
L.H.S.→68 × 2 – 42 + 108 ÷ 12
= 68 × 2 – 42 + 9
= 136 – 42 + 9
= 103 = R.H.S.
Fourth option:
÷ and +
L.H.S.→
68 + 2 – 42 ÷ 108 × 12
= 68 + 2 – 0.38 × 12
= 68 + 2 – 4.66
= 65.34 ≠ 103
So, only the third option satisfies the R.H.S. of the given equation. Hence, the third option is correct.
Related Questions
Know More about
Staff Selection Commission Multi Tasking ...
Answer Key | Cutoff | Selection Process | Preparation Tips | Eligibility | Application | Exam Pattern
Get Updates Brochure
Your Staff Selection Commission Multi Tasking Staff Exam brochure has been successfully mailed to your registered email id “”.
