mscroggs.co.uk
mscroggs.co.uk

subscribe

Puzzles

Square cross

A figure in the shape of a cross is made from five 1 x 1 squares, as shown. The cross is inscribed in a large square whose sides are parallel to the dashed square, formed by four vertices of the cross.
What is the area of the large outer square?

Show answer

If you enjoyed this puzzle, check out Sunday Afternoon Maths XXIV,
puzzles about geometry, or a random puzzle.

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

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

Archive

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