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Advent calendar 2017

9 December

Write the numbers 1 to 15 in a row. Underneath, write the same list without the first and last numbers. Continue this until you have just one number left.
Today's number is the sum of all the numbers you have written.
Tags: numbers

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Sunday Afternoon Maths LXVII

Coloured weights
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Advent calendar 2018

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Cryptic crossnumber #2

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Cryptic crossnumber #1
Breaking Chocolate
Square and cube endings

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

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