Questions & Answers about Ten problem jest prostszy niż tamten.
Because problem is a masculine singular noun in the nominative case, and ten is the matching form of this for masculine nouns.
Polish demonstratives change to match the noun’s:
- gender
- number
- case
So:
Tamten means that one or that.
In this sentence, it stands for tamten problem = that problem, but Polish often leaves out the repeated noun when it is obvious from context.
So:
- Ten problem jest prostszy niż tamten. literally = This problem is simpler than that one.