mscroggs.co.uk
mscroggs.co.uk

subscribe

Advent calendar 2017

14 December

There are 204 squares (of any size) in an 8×8 grid of squares. Today's number is the number of squares in a 13×13 grid of squares

Archive

Show me a random puzzle
 Most recent collections 

Advent calendar 2025

Advent calendar 2024

Advent calendar 2023

Advent calendar 2022


List of all puzzles

Tags

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

Archive

Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2012–2026