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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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Sunday Afternoon Maths LXVII

Coloured weights
Not Roman numerals

Advent calendar 2018

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Cryptic crossnumber #2

Sunday Afternoon Maths LXV

Cryptic crossnumber #1
Breaking Chocolate
Square and cube endings

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

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