Morten fills in the cells on the diagram shown so that each cell contains either an or an . He also ensures there is no line of four consecutive identical symbols in any column, row or diagonal. When he has completed the diagram, what will the column coloured grey contain?
Select one option, then click Submit.
3 Os and 3 Xs
2 Os and 4 Xs
4 Os and 2 Xs
5 Os and 1 X
1 O and 5 Xs
Select an option, then submit.
Sign in or create an account to reveal answers, view the solution, and save your progress. Create a free account to unlock practice and keep track of your work.
Grey Kangaroo (2025)
One puzzle per day. Cryptarithm, Magic Square, Summit. No sign-up required to play.
Play daily puzzle →Interactive problems and curated lessons—water pouring, magic squares, knight's tour, and more.
Browse library →See how you rank. Top solvers by problems solved correctly. Sign in to climb the ranks.
View leaderboard →Grey Kangaroo (2025)