Discussion Forum

1)

Find the missing number.

27 :51 :: 83 : _

Answer:

Option C

Explanation:

The given analogy can be written as 

$5^{2}+2$ : $7^{2}+2$ :: $9^{2}+2$ :_

5&7 are successive odd numbers Similarly next odd number to 9 is 11 and $11^{2}+2$=$121+2=123$