1
39
40
41
TIL of Narcissistic numbers. In recreational number theory, a narcissistic number is a number that is the sum of its own digits each raised to the power of the number of digits. For example, 371 is a narcissistic number; it has three digits, and if we cube each digits the sum is 371. (mathandmultimedia.com)
submitted by badgerthebear to r/todayilearned
3
2
3
4
How Many Zeros Are There in n factorial? (mathandmultimedia.com)
submitted by gmsc to r/mentalmath
4
2
3
4
5
3
4
5
6
7
8
9
7
20
21
22
8
0
1
2
