mscroggs.co.uk
mscroggs.co.uk

subscribe

Advent calendar 2017

4 December

Pick a three digit number whose digits are all different.
Sort the digits into ascending and descending order to form two new numbers. Find the difference between these numbers.
Repeat this process until the number stops changing. The final result is today's number.

Archive

Show me a random puzzle
 Most recent collections 

Advent calendar 2023

Advent calendar 2022

Advent calendar 2021

Advent calendar 2020


List of all puzzles

Tags

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

Archive

Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2012–2024