mscroggs.co.uk
mscroggs.co.uk

subscribe

Advent calendar 2023

6 December

There are 5 ways to tile a 4×2 rectangle with 2×1 pieces:
How many ways are there to tile a 12×2 rectangle with 2×1 pieces?

Show answer

Archive

Show me a random puzzle
 Most recent collections 

Advent calendar 2024

Advent calendar 2023

Advent calendar 2022

Advent calendar 2021


List of all puzzles

Tags

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

Archive

Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2012–2025