mscroggs.co.uk
mscroggs.co.uk

subscribe

Advent calendar 2018

20 December

Today's number is the sum of all the numbers less than 40 that are not factors of 40.

Archive

Show me a random puzzle
 Most recent collections 

Advent calendar 2024

Advent calendar 2023

Advent calendar 2022

Advent calendar 2021


List of all puzzles

Tags

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

Archive

Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2012–2025