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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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Sunday Afternoon Maths LXVII

Coloured weights
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Cryptic crossnumber #2

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Cryptic crossnumber #1
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dates colouring trigonometry percentages menace integration circles star numbers cryptic crossnumbers irreducible numbers dodecagons logic books digits addition taxicab geometry probabilty cube numbers means factors parabolas hexagons time sum to infinity perimeter shapes square numbers perfect numbers doubling complex numbers floors palindromes crossnumbers proportion averages rugby factorials cryptic clues unit fractions sequences coordinates routes functions geometry pascal's triangle numbers money prime numbers speed advent graphs square roots angles spheres polygons clocks chocolate balancing number lines shape planes ave folding tube maps 3d shapes squares crosswords indices quadratics volume wordplay ellipses odd numbers coins dice differentiation games chess multiplication bases triangle numbers algebra rectangles symmetry regular shapes christmas surds probability remainders scales integers cards triangles calculus multiples chalkdust crossnumber fractions arrows partitions division 2d shapes people maths sums mean area sport grids

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