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

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