Question : Directions: Select the option 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. 7 : 36 :: 16 : 225 :: 21 : ?
Option 1: 400
Option 2: 385
Option 3: 441
Option 4: 395
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Correct Answer: 400
Solution : Given: 7 : 36 :: 16 : 225 :: 21 : ?
Subtract 1 from the first number, and then square the resultant, to get the second number – Like, 7 : 36→(7 – 1) 2 = 36 And, 16 : 225→(16 – 1) 2 = 225 Similarly, follow the same pattern for 21 : ?→(21 – 1) 2 = 400
So, 400 is the required missing term. Hence, the first option is correct.
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