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


Advent calendar 2018

1 December

There are 5 ways to write 4 as the sum of 1s and 2s:
Today's number is the number of ways you can write 12 as the sum of 1s and 2s.

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Tags: numbers


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Sunday Afternoon Maths LXVII

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Advent calendar 2018

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


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