My stepdaughter is the sameIt’s prime numbers I have to avoid, so I can have the telly volume on 21 or 25, but not 23. Then I turn it up/down by factors of its starting point. So if 21 isn’t loud enough, it goes up to 24 or 27 or 30.

If the starting volume is 25, it goes up to 30 or down to 20.

I appreciate this is weird