# 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

chalkdust crossnumber chocolate regular shapes sequences irreducible numbers grids parabolas shapes logic sums probabilty surds dates cryptic crossnumbers trigonometry factors cards chess circles ellipses area indices integers shape digits books sum to infinity graphs volume averages unit fractions calculus symmetry lines wordplay number taxicab geometry rugby dodecagons functions dice square numbers money percentages fractions pascal's triangle square roots perfect numbers proportion time balancing geometry doubling factorials scales polygons prime numbers games floors ave menace palindromes hexagons angles spheres colouring integration clocks multiplication sport speed routes bases algebra crosswords triangle numbers mean numbers squares arrows means christmas perimeter quadratics triangles rectangles differentiation planes odd numbers cryptic clues complex numbers star numbers 2d shapes partitions division cube numbers coordinates probability remainders coins folding tube maps multiples people maths 3d shapes addition crossnumbers advent## 4 December

Today's number is the number of 0s that 611! (611×610×...×2×1) ends in.