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

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