5 to 10 consists of 6 numbers even though it looks like it consists of 5 numbers in plain sight. amirite?

It's actually only 3 numbers.

5, 2, 10

You can prove you've got eleven fingers like this - count your left fingers 10, 9, 8, 7, 6... and five on your other hand makes 11.

Yes, this is how counting works.

0-5 is six numbers too.

It consists of 7 numbers as there are two numbers in 10.

5 = 1,
6 = 2,
7 = 3,
8 = 4,
9 = 5,
1,0 = 6, and 7

1-5 is 5 numbers.

6-10 is 5 numbers (the other half of 10)

So yeah clearly 5-10 is 6 numbers.

You are basically just removing 1-4 from 10.