Question 4

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 : ?

Solution

Given that 21:529::25:729::17

As per given pattern follow

$$ [21 \times (21+4)]+4 = 529 $$

and $$[ 25 \times (25+4)]+4 = 729$$

next $$ [ 17 \times (17+4)] + 4 = 361 $$ Ans

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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 : ?