College+ · Advanced Topics

Number theory

273 problems in this skill, each with a solver-verified answer key. Answers are checked the moment you submit — with a hint if you want one and a worked solution afterwards.

What the problems look like

A few statements from this skill. Answers, hints and worked solutions live in the practice session.

Warm-up
Compute $\gcd(24, 42)$ .
Warm-up
Compute $\gcd(24, 108)$ .
Warm-up
Compute $\gcd(36, 45)$ .

Problems shown under their original terms: Generated (template, solver-computed).

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