Skip to content

Problems Progress About

Follow @axiomiq.official →

← All problems

0:00

Combinatorics 3.0/10

Trailing Zeros

How many zeros does 100! (100 factorial) end in?

combinatorics

Your answer

Reveal solution →

Solution

Open this solution on its own page →

Related problems show

Related problems

The Hundred Lockers Logic Puzzles · 5.0/10
The Handshake Count Combinatorics · 3.0/10
Tiling with Dominoes Combinatorics · 3.0/10
Derangements Combinatorics · 5.0/10
Threes and Fives Combinatorics · 2.2/10
Burning Ropes Logic Puzzles · 7.0/10
Paths Below the Diagonal Combinatorics · 3.0/10
Sixty Heads Statistics · 5.0/10

Source: Application of Legendre's formula (1808); standard number-theory exercise. Statement written for AxiomIQ.

‹ Tiling with Dominoes Traveler's Dilemma ›

© 2026 AxiomIQ

Problems Progress About Privacy Terms

A free, open library of problems.