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 

Sunday Afternoon Maths LXVII

Coloured weights
Not Roman numerals

Advent calendar 2018

Sunday Afternoon Maths LXVI

Cryptic crossnumber #2

Sunday Afternoon Maths LXV

Cryptic crossnumber #1
Breaking Chocolate
Square and cube endings

List of all puzzles

Tags

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

Archive

Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2019