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

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

Archive

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