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

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