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

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

Archive

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