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


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