Advent calendar 2015

5 December

How many different triangles are there with a perimeter of 100 and each side having an integer length?
(different = not rotations or reflections)


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Sunday Afternoon Maths LXVII

Coloured weights
Not Roman numerals

Advent calendar 2018

Sunday Afternoon Maths LXVI

Cryptic crossnumber #2

Sunday Afternoon Maths LXV

Cryptic crossnumber #1
Breaking Chocolate
Square and cube endings

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


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