Question : Directions: Select the option that is related to the fifth number in the same way as the second number is related to the first number and the fourth number is related to the third number.
10 : 142 :: 17 : 359 :: 21 : ?
Option 1: 525
Option 2: 529
Option 3: 527
Option 4: 576
Correct Answer: 527
Solution :
Given:
10 : 142 :: 17 : 359 :: 21 : ?
Like, 10 : 142→(10 + 2)
2
– 2 = (12)
2
– 2 = 144 – 2 = 142
17 : 359→(17 + 2)
2
– 2 = (19)
2
– 2 = 361 – 2 = 359
Similarly, 21 : ?→ (21 + 2)
2
– 2 = (23)
2
– 2 = 529 – 2 = 527
So, 527 is related to 21. Hence, the third option is correct.
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