Hello community. I have been practicing problems on CF for quite some time now. My greatest shortcoming is solving problems having only "Math" tag and having some form of raw mathematical thinking skill as requirement. I struggle even with 800-900 rated problems of this type. For clarification, here are few problems where I struggled:

https://codeforces.me/problemset/problem/1283/B

https://codeforces.me/contest/1363/problem/A

https://codeforces.me/problemset/problem/1437/A

Also, I would like to point out that I don't face much difficulty with problems where I have to use Math algorithms like GCD, sieve etc.

So, how do I recover from this discomfort? Would simply solving the Math tagged problems in increasing rating be sufficient? Or are there other resources?

Also, just curious whether Math problems are difficult in general for non-math background people.