Question

my number has 2hundreds. the tens digit is 9 more than the ones digit. my number is

Answer 1

290.

We know that the hundreds is two already.
The tens digit is 9 more than the ones digit, but since a digit can't be more than 9, the ones must be 0.

So the tens is 9 and the ones place is 0.

Answer 2

2 hundreds ⇒ hundreds digit is 2
tens digit is 9 more than unit digit⇒ tens digit is 9 as 9 is the maximum
unit digit = 9 - 9 =0
So the number is 290.