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


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