mscroggs.co.uk
mscroggs.co.uk

subscribe

Puzzles

21 December

The factors of 6 (excluding 6 itself) are 1, 2 and 3. \(1+2+3=6\), so 6 is a perfect number.
Today's number is the only three digit perfect number.

Archive

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

Tags

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

Archive

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