How many times larger is the spacing between the energy levels with n=3 and n=4,then the spacing between the energy levels with n=8 and n=9 for a hydrogen like atom or ion?

Ratio of difference of spacing between the energy levels with n=3 and n=4 and the spacing between the energy levels with n=8 and n=9 for a hydrogen like atom or ion is

How many times larger is the spacing between the energy levels corresponding to n=8 and n=7 than the spacing between the energy levels corresponding to n=2 and n=3 , for a hydrogen atom ?

Are the differences in energy between successive energy levels of a hydrogen-like atom same ? Explalin.

What is the energy difference between the n=2 and n=3 levels for the hydrogen atom?

How does the energy gap between successive energy levels in an atom vary from low to high n values?