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 2023

Advent calendar 2022

Advent calendar 2021

Advent calendar 2020


List of all puzzles

Tags

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

Archive

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