10 December

This number is divisible by 2. One more than this number is divisible by 3. Two more than this number is divisible by 5. Three more than this number is divisible by 7. Four more than this number is divisible by 11. Five more than this number is divisible by 13.


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


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