Square Detective
Square Detective© 2026 Maths ModelledSquare Detective© 2026 Maths ModelledSquare Detective© 2026 Maths ModelledInvestigate each card and sort the whole deck.
A rectangle does not always show a square number. One is square: 1 × 1 = 1. Zero is also square: 0 × 0 = 0, but there are no counters to arrange.
Hint gives thinking advice. New game shuffles the selected deck into a fresh order; Restart repeats this game's order. A deck with no new order available can be restarted.
Teacher settings lets you enter up to 16 different whole-number cards from 0 to 40, separated by commas or spaces. Use each number once. Use these cards starts a fresh game; Use original deck restores the original numbers. Invalid cards leave the current game intact.
Play individually, with a partner or together on the classroom screen. There is no timer. Use Tab to move between controls and Enter or Space to press a button. Share this setup shares the selected deck and starts an unsolved game. Print prints the current display on one A4 landscape page.