We’re planning to reprise our some-but-not-every-yearly advent calendar of mathematical curiosities, starting here on 1st December and proceeding very advent-calendar-like daily thereafter. You’ll see posts appear in our site feed and on Twitter, and we’ll keep this post updated with links to each day’s post. Credit to Number Gossip for the numbery facts.
The only triangular cube
The only even prime
The only prime followed by a square
The smallest number of colours sufficient to colour any planar map
The number of Platonic solids
The smallest perfect number
The only prime followed by a cube
The only composite cube in the Fibonacci sequence
The smallest odd composite number
The base of our number system
The only prime comprising an even number of identical digits
The smallest abundant number
The smallest emirp
The smallest positive integer n such that n and $2^n$ end with the same digit
The smallest emirpimes
The number of vertices of a tesseract
The number of syllables in a haiku
The only number that is twice the sum of its digits
The largest prime which is a palindrome in Roman numerals
The maximum number of moves needed to solve the Rubik’s cube
The number of spots on a standard cubical die
The only fixed point of the Look and Say operation
The smallest isolated prime (not a Twin prime)
The only number that is the product of all the numbers less than its square root
We wish you all a brilliant festive season!
20 Responses to “Aperiodvent 2018 – a month of mathematical things”