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


Advent calendar 2015

24 December

Today's number is the largest possible remainder which can be obtained when dividing one of the answers in this advent calendar by another answer smaller than it (not including today's answer!).


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


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