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Advent calendar 2016

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

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