Math
Number theory, combinatorics, and arithmetic tricks.
Foundation
Learn the invariant, apply it independently, then pass the Math checkpoint.
- Pow(x, n) (Medium)
Checkpoint
A graded check of the core Math reasoning skills.
Pattern Quest
Practice recognizing math problem shapes.
Math
Practice number representation, modular arithmetic, combinatorics, geometry, and numerical invariants while accounting for overflow and boundary cases.
- Add binary (Easy)
- Add two big string numbers (Easy)
- Base 26 encoding (Easy)
- Basic Calculator II (Medium)
- Cinema Seat Allocation (Medium)
- Convert decimal to base N (Easy)
- Convert Integer to Roman Numeral (Medium)
- Convert string to integer (Medium)
- Count set bits in number (Easy)
- Factorial number (Easy)
- Fibonacci number (Easy)
- Find missing number (Easy)
- Find single number (Easy)
- Fizzbuzz (Easy)
- Hamming distance (Easy)
- Integer to English Words (Medium)
- Is odd number (Easy)
- Is palindromic number (Easy)
- Is power of two (Easy)
- Is strobogrammatic number (Easy)
- K Closest Points to Origin (Medium)
- Log two (Easy)
- Maximum Number of Visible Points (Hard)
- Maximum Split of Positive Even Integers (Medium)
- Maximum Swap (Medium)
- Minimum Cost to Set Cooking Time (Medium)
- Minimum Moves to Equal Array Elements (Medium)
- Multiply string numbers (Medium)
- Multiply Strings (Medium)
- Next Greater Element III (Medium)
- Power of two (Easy)
- Power X of Y (Easy)
- Prime number (Easy)
- Random number (Easy)
- Random number not in array (Medium)
- Reverse number (Easy)
- Square root (Easy)
- Sum of digits (Easy)