Question

$398=964,118=164,356=936,423=?$

What comes in place of $\text{'}?\text{'}$

Answer 1

In the given pattern the second number is created by taking squares of the first and last digit.

i.e. $3^2=9$ and $8^2=64$ which formed a number $964$.

Similarly $1^2=1$ and $8^2=64$ which formed a number $118$.

Similarly $3^2=9$ and $6^2=36$ which formed a number $936$.

Hence, the next number is $4^2=16$ and $3^2=9$ with which number is $169$.

Hence,$169$ is the number.