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.

Show answer

15 December

There are 5 ways to make 30 by multiplying positive integers (including the trivial way):
Today's number is the number of ways of making 30030 by multiplying.

Show answer


Show me a random puzzle
 Most recent collections 

Advent calendar 2019

Sunday Afternoon Maths LXVII

Coloured weights
Not Roman numerals

Advent calendar 2018

Sunday Afternoon Maths LXVI

Cryptic crossnumber #2

List of all puzzles


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


Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2012–2020