Skip to main content

Practice

Number Theory Problem Set

⭐⭐ intermediate~45 min of coding5 challenges

gcd/lcm, divisor counting, primality, digit chains, and divisor sums — all O(sqrt n) drills.

Checking your progress…0%

What you will practice

  1. GCD and LCM⭐ beginner
  2. Count the Divisors⭐⭐ intermediate
  3. Prime Verdict⭐⭐ intermediate
  4. Digit Sum Chain⭐⭐ intermediate
  5. Sum of Divisors⭐⭐ intermediate

Need the concept first? Re-read the lesson.