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 : ?
 Given that 10 : 142 :: 17 : 359 :: 21 : ?
The Pattern follows $$x :( x+2)^2 -2 $$
 $$ 10 : (10 +2)^2 -2 $$
$$\Rightarrow (12)^2 - 2 = 144-2 = 142 $$
therefore 10: 142Â
$$ 17: (17+2)^2 -2 $$
$$\Rightarrow (19)^2-2 = 361 -2 = 359 $$
therefore 17: 359
Next $$ ? = (21+2)^2 - 2 $$
$$\Rightarrow ? = (23)^2 - 2 = 529 -2 = 527$$
therefore 21 : 527Â
? = 527 AnsÂ
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