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Deductive reasoning
Hard
CX
Deductive Logic (gap)
Fill the hole in the matrix
A matrix or table with a cell missing. The surrounding structure encodes rules across both rows and columns, and you must satisfy all of them at once to work out what belongs in the gap.
Duration
~6 min
Length
Speeded set
Difficulty
Hard
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What to expect
- A grid with one missing entry.
- Rules running along both rows and columns.
- Options designed to satisfy only one of the constraints.
What it measures
- Deductive reasoning
- Constraint satisfaction
- Attention to structure
Instructions
- 1Solve the row rule and the column rule separately, then intersect them.
- 2Eliminate options that break either rule.
- 3Check your answer against a second row before committing.
Tips
- Most wrong answers satisfy one axis and fail the other — always check both.
- Start from whichever line has the most information.
Format: Deductive logic · speeded · 6 min