mscroggs.co.uk
mscroggs.co.uk

subscribe

Advent calendar 2015

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

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

Archive

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