Advent calendar 2019

24 December

There are six 3-digit numbers with the property that the sum of their digits is equal to the product of their digits. Today's number is the largest of these numbers.

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


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