Deductive-logical Thinking

This test measures deductive logical thinking — your ability to work out rules and apply them.

You'll see a grid of up to five symbols and one cell with a question mark. Each symbol appears once per row and once per column.

Replace the question mark using the answer bar below the grid. Green means correct, red means incorrect.

Use the visible symbols in the question mark's row and column to deduce which symbol fits.

Tip: click any empty cell to jot down a candidate symbol while you reason — these notes don't count toward your score.

You have 6 minutes for as many tasks as you can. Grids start at 4×4 and grow to 5×5.