Question : Directions: The second number in the given number pairs is obtained by performing certain mathematical operation(s) on the first number. The same operation(s) is/are followed in all the number pairs except one. Find that odd number pair.
Option 1: 20 : 11
Option 2: 6 : 4
Option 3: 15 : 9
Option 4: 12 : 7
Correct Answer: 15 : 9
Solution :
Let's check the options –
First option:
20 : 11; (11 × 2) – 2 = 22 – 2 = 20
Second option:
6 : 4; (4 × 2) – 2 = 8 – 2 = 6
Third option:
15 : 9; (9 × 2) – 2 = 18 – 2 = 16 ≠ 15
Fourth option:
12 : 7; (7 × 2) – 2 = 14 – 2 = 12
So, only the third option is different from the other three. Hence, the third option is correct.
Related Questions
Know More about
Staff Selection Commission Combined Grad ...
Admit Card | Eligibility | Application | Selection Process | Preparation Tips | Result | Answer Key
Get Updates Brochure
Your Staff Selection Commission Combined Graduate Level Exam brochure has been successfully mailed to your registered email id “”.
