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. 21 : 529 :: 25 : 729 :: 17 : ?
Option 1: 441
Option 2: 289
Option 3: 324
Option 4: 361
Correct Answer: 361
Solution : Given: 21 : 529 :: 25 : 729 :: 17 : ?
Add 2 to the first number and determine the square of the resultant to get the second number – Like in, 21 : 529→(21 + 2) 2 = 529 And in, 25 : 729→(25 + 2) 2 = 729 Similarly, follow the same pattern for 17 : ? → (17 + 2) 2 = 361
Therefore, 361 is related to 17. Hence, the fourth option is correct.
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