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Advent calendar 2015

9 December

You start at A and are allowed to move either to the right or upwards.
How many different routes are there to get from A to B?

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Advent calendar 2019

Sunday Afternoon Maths LXVII

Coloured weights
Not Roman numerals

Advent calendar 2018

Sunday Afternoon Maths LXVI

Cryptic crossnumber #2

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

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