Question

Select the odd pair from the given numbers.
1. 11 : 1333
2. 9 : 731
3. 13 : 2197
4. 7 : 345

Answer 1

Correct Answer - Option 3 : 13 : 2197

LOGIC: (First Number)³ + 2 = Second Number

1) In 11 : 1333 →

11³ + 2

= 1331 + 2

= 1333

2) In 9 : 731 →

9³ + 2

= 729 + 2

= 731

3) In 13 : 2197 →

13³ + 2

= 2197 + 2

= 2199 ≠ 2197

4) In 7 : 345 →

7³ + 2

= 343 + 2

= 345

Hence, "13 : 2197" is the correct answer.