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

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