Question

The square of which of the following number will be odd numbers?
$\left(i\right)431$
$\left(ii\right)2826$
$\left(iii\right)7779$
$\left(iv\right)82004$

Answer 1

We know that, square of an odd number is always an odd number.

Now, In $431,2826,7779$ and $82004$,

$431$ and $7779$ are the odd numbers.

$\Rightarrow$ The square of $431$ and $7779$ are odd numbers..

Hence, (i) and (iii) are correct.