mscroggs.co.uk
mscroggs.co.uk

subscribe

Advent calendar 2015

21 December

This year, I posted instructions for making a dodecahedron and a stellated rhombicuboctahedron.
To get today's number, multiply the number of modules needed to make a dodecahedron by half the number of tube maps used to make a stellated rhombicuboctahedron.

Show answer

Archive

Show me a random puzzle
 Most recent collections 

Advent calendar 2025

Advent calendar 2024

Advent calendar 2023

Advent calendar 2022


List of all puzzles

Tags

matrices lists mean factorials balancing tangents medians square numbers products polygons unit fractions area factors cryptic crossnumbers sum to infinity number probabilty grids albgebra people maths advent clocks lines shape sport coordinates means 3d shapes spheres planes colouring quadratics books bases remainders floors fractions tiling square grids irreducible numbers partitions geometry crosswords games complex numbers rugby sequences scales sets crossnumbers taxicab geometry even numbers integration trigonometry the only crossnumber rectangles money probability coins median perfect numbers palindromes dodecagons cryptic clues combinatorics geometric mean axes hexagons wordplay multiples decahedra volume functions pentagons multiplication powers cube numbers menace division expansions perimeter angles averages algebra folding tube maps ellipses proportion triangle numbers percentages integers cubics shapes tournaments symmetry speed chalkdust crossnumber triangles surds gerrymandering arrows prime numbers xor 2d shapes sums calculus numbers regular shapes time multiplaction squares graphs circles digits squares parabolas dates doubling odd numbers indices addition pascal's triangle ave elections digital products logic quadrilaterals binary christmas polynomials dice consecutive numbers neighbours digital clocks range chocolate geometric means square roots prime factors dominos differentiation determinants cards routes consecutive integers chess star numbers

Archive

Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2012–2026