Click here to win prizes by solving the puzzle Advent calendar.
Click here to win prizes by solving the puzzle Advent calendar.


Advent calendar 2016

21 December

Today's number is a multiple of three. The average (mean) of all the answers that are multiples of three is a multiple of 193.
Tags: averages, mean


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Sunday Afternoon Maths LXVII

Coloured weights
Not Roman numerals

Advent calendar 2018

Sunday Afternoon Maths LXVI

Cryptic crossnumber #2

Sunday Afternoon Maths LXV

Cryptic crossnumber #1
Breaking Chocolate
Square and cube endings

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


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