Let us write some multiples of 4.
4,8,12,16,20,24,28,32,36,40.
<h3>We can see that 12,16, 32,36 are the multiples of 4 those have odd numbers 1 and 3 at tens places.</h3>
Now, we need to check the numbers on ones places of those multiples we got.
<h3>Ae can see that at ones places we have 2 and 6 numbers.</h3>
If we find some more mutiples, we get same odd numbers at tens places and same even numbers 2 and 6 at ones places.