Maths Problems

Prime numbers, combinatorics, puzzles, geometry, and number theory problems.

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Prime Numbers
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Check if a number is prime Easy
Solution
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Calculate all prime numbers till N Medium
Solution
Puzzle & DP Problems
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Perform A/B without using *, /, or % operator Medium
Solution
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Egg Drop Puzzle – 2 Eggs & 100 Floors Medium
Solution
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Egg Drop Puzzle – 2 Eggs & N Floors Medium
Solution
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Egg Drop Puzzle – K Eggs & N Floors (DP) Hard
Solution
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Count trailing zeroes in n! Medium
Solution
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Form the largest number from an integer array Medium
Solution
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Max Points on a line Hard
Solution
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Next Greater Number Medium
Solution
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Square root of x Medium
Solution
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Generate the nth ugly number (factors 2,3,5 only) Medium
Solution
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Check if a string is a valid number Hard
Solution
Points & Geometry
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Count Triangles from a given array Medium
Solution
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Check if 4 points form a rectangle Medium
Solution
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Check if 4 points form a square Medium
Solution
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Check if two line segments intersect Medium
Solution
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Check if a point is inside a triangle Medium
Solution
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Check if a point is inside a polygon Hard
Solution
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Closest pair in a 2D plane Hard
Solution
Power Checks
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Check if a number is power of 3 Medium
Solution
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Check if a number is power of 4 Medium
Solution