Which of the following number is NOT divisible by 10?

A number is divisible by 10 if it has zero (0) in its units place.

Now let's check all the options.

Option A:

Since the units digit in the number 150 is 0, the given number is divisible by 10.

Option B:

Since the units digit in the number 2020 is 0, the given number is divisible by 10.

Option C:

Since the units digit in the number 125 is 5, the given number is not divisible by 10.

Option D:

Since the units digit in the number 1010 is 0, the given number is divisible by 10.

So, except 125, all the given numbers are divisible by 10.