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

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

Archive

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