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

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