Math Is Fun Forum
Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °
You are not logged in.
- Topics: Active | Unanswered
#1 2008-09-13 09:35:29
- tony123
- Member
- Registered: 2007-08-03
- Posts: 230
N!
For a positive integer,
, we define N! (read N factorial) tobe the product of all the integers from 1 to N. Thus:
It is clear that N! will end in a zero if N is larger or equal to
5. For big values of N, N! will end in many, many zeros.
How many zeros will end in?
Last edited by tony123 (2008-09-13 09:38:07)
Offline
#2 2008-09-13 10:17:47
- mathsyperson
- Moderator
- Registered: 2005-06-22
- Posts: 4,900
Re: N!
75/5 + 75/5² = 18.
Why did the vector cross the road?
It wanted to be normal.
Offline