mscroggs.co.uk
mscroggs.co.uk

subscribe

Puzzles

22 December

Today's number is a palindrome. Today's number is also the number of palindromes between 111 and 11111 (including 111 and 11111).

14 December

What is the only palindromic three digit prime number which is also palindromic when written in binary?

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

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

Archive

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