What's Special About This Number?
Popularity Report
 |
|||
|
|||
|
|||
|
|||
|
|||
|
Rank
URL Tag Cloud
Bookmark History
Saved by 278 people (-52 private), first by anonymouse user on 2006-03-02
- Aliciautterback on 2009-10-21 - Tags math , numbers , mathematics , reference , interesting
- Ddegroat on 2009-10-02 - Tags math , numbers , mathematics , reference , interesting
- Rmccubbing on 2009-09-03 - Tags BG , ICT , Math , MathD3
- Midurant on 2009-07-31 - Tags no_tag
- Inkedpolyglot on 2009-07-08 - Tags Curiousities , Science
Public Sticky notes
0 is the additive identity.
1 is the multiplicative identity.
2 is the only even prime.
3 is the number of spatial dimensions we live in.
4 is the smallest number of colors sufficient to color all planar maps.
5 is the number of Platonic solids.
1 is the multiplicative identity.
2 is the only even prime.
3 is the number of spatial dimensions we live in.
4 is the smallest number of colors sufficient to color all planar maps.
5 is the number of Platonic solids.
Highlighted by varske
What's Special About This Number?
Highlighted by maggie_diigo
0 is the additive identity.
1 is the multiplicative identity.
2 is the only even prime.
3 is the number of spatial dimensions we live in.
4 is the smallest number of colors sufficient to color all planar maps.
5 is the number of Platonic solids.
6 is the smallest perfect number.
7 is the smallest number of faces of a regular polygon that is not constructible by straightedge and compass.
8 is the largest cube in the Fibonacci sequence.
9 is the maximum number of cubes that are needed to sum to any positive integer.
10 is the base of our number system.
11 is the largest known multiplicative persistence.
12 is the smallest abundant number.
13 is the number of Archimedian solids.
14 is the smallest number n with the property that there are no numbers relatively prime to n smaller numbers.
15 is the smallest composite number n with the property that there is only one group of order n.
16 is the only number of the form xy = yx with x and y different integers.
17 is the number of wallpaper groups.
18 is the only number that is twice the sum of its digits.
19 is the maximum number of 4th powers needed to sum to any number.
20 is the number of rooted trees with 6 vertices.
21 is the smallest number of distinct squares needed to tile a square.
1 is the multiplicative identity.
2 is the only even prime.
3 is the number of spatial dimensions we live in.
4 is the smallest number of colors sufficient to color all planar maps.
5 is the number of Platonic solids.
6 is the smallest perfect number.
7 is the smallest number of faces of a regular polygon that is not constructible by straightedge and compass.
8 is the largest cube in the Fibonacci sequence.
9 is the maximum number of cubes that are needed to sum to any positive integer.
10 is the base of our number system.
11 is the largest known multiplicative persistence.
12 is the smallest abundant number.
13 is the number of Archimedian solids.
14 is the smallest number n with the property that there are no numbers relatively prime to n smaller numbers.
15 is the smallest composite number n with the property that there is only one group of order n.
16 is the only number of the form xy = yx with x and y different integers.
17 is the number of wallpaper groups.
18 is the only number that is twice the sum of its digits.
19 is the maximum number of 4th powers needed to sum to any number.
20 is the number of rooted trees with 6 vertices.
21 is the smallest number of distinct squares needed to tile a square.
Highlighted by maggie_diigo
|
primes
graphs
digits
sums of powers
bases combinatorics powers/polygonal Fibonacci geometry repdigits algebra perfect/amicable pandigital matrices divisors games/puzzles |
Highlighted by ronbowden
What's Special About This Number?
Highlighted by fichter
What's Special About This Number?
Highlighted by fichter
What's Special About This Number?
Highlighted by fichter
0 is the additive identity.
1 is the multiplicative identity.
2 is the only even prime.
3 is the number of spatial dimensions we live in.
4 is the smallest number of colors sufficient to color all planar maps.
5 is the number of Platonic solids.
6 is the smallest perfect number.
7 is the smallest number of integer-sided rectangles that tile a rectangle so that no 2 rectangles share a common length.
8 is the largest cube in the Fibonacci sequence.
9 is the maximum number of cubes that are needed to sum to any positive integer.
10 is the base of our number system
Highlighted by paulfauth
What's Special About This Number?
If you know a distinctive fact about a number not listed here, please e-mail me.
Highlighted by tzon02
What's Special About This Number?
If you know a distinctive fact about a number not listed here, please e-mail me.
Highlighted by tzon02
What's Special About This Number?
If you know a distinctive fact about a number not listed here, please e-mail me.
Highlighted by tzon02
Public Comment
on 2006-10-31 by z1jerry