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


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