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Advent calendar 2015

16 December

Today's number is four thirds of the average (mean) of the answers for 13th, 14th, 15th and 16th December.

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

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