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Advent calendar 2016

21 December

Today's number is a multiple of three. The average (mean) of all the answers that are multiples of three is a multiple of 193.
Tags: averages, mean

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

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