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

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

Archive

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