Question

Select the number-pair in which the two numbers are related in the same way as are the two numbers of the following number-pair.

16 ∶ 224 

1. 17 ∶ 289
2. 22 ∶ 440
3. 25 ∶ 650
4. 20 ∶ 400

Answer 1

Correct Answer - Option 2 : 22 ∶ 440

Given: 16 ∶ 224 

Pattern: 

16 ⇒ (16)² - (16 × 2) = 256 - 32 ⇒ 224

Similarly, 

22 ⇒ (22)2 - (22 × 2) = 484 - 44 ⇒ 440

Hence, 440 is correct.