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

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

Archive

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