# Advent calendar 2018

## Archive

Show me a random puzzle**Most recent collections**

#### Sunday Afternoon Maths LXVII

Coloured weightsNot Roman numerals

#### Advent calendar 2018

#### Sunday Afternoon Maths LXVI

Cryptic crossnumber #2#### Sunday Afternoon Maths LXV

Cryptic crossnumber #1Breaking Chocolate

Square and cube endings

List of all puzzles

## Tags

factorials cube numbers division planes means circles colouring advent mean christmas folding tube maps lines 3d shapes averages numbers prime numbers unit fractions wordplay shape crossnumbers trigonometry integers chess multiplication menace remainders number chalkdust crossnumber triangles crosswords shapes speed probability 2d shapes perfect numbers sequences fractions percentages arrows doubling bases coins squares taxicab geometry square numbers proportion sport balancing cryptic crossnumbers ave cards spheres quadratics routes chocolate ellipses factors complex numbers area dodecagons logic coordinates volume grids integration pascal's triangle rectangles palindromes algebra rugby sum to infinity money parabolas people maths probabilty square roots time addition star numbers indices geometry floors dates multiples functions hexagons cryptic clues books perimeter triangle numbers graphs sums irreducible numbers odd numbers scales polygons angles differentiation dice clocks games calculus symmetry digits regular shapes surds partitions## 15 December

Today's number is smallest three digit palindrome whose digits are all non-zero, and that is not divisible by any of its digits.