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Advent calendar 2017

1 December

Today's number is the smallest three digit number such that the sum of its digits is equal to the product of its digits.

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

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