mscroggs.co.uk
mscroggs.co.uk

subscribe

Puzzles

1 December

One of the vertices of a rectangle is at the point \((9, 0)\). The \(x\)-axis and \(y\)-axis are both lines of symmetry of the rectangle.
What is the area of the rectangle?

Show answer

Placing plates

Two players take turns placing identical plates on a square table. The player who is first to be unable to place a plate loses. Which player wins?

Show answer & extension

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

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

Archive

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