Matrix 4×4

Find the missing number in a 4×4 matrix where rows and columns follow hidden rules.

How to play

A 4×4 grid of numbers follows a rule across its rows and/or columns, with one cell left blank. Work out the rule and fill in the missing value.

• Check rows and columns for a shared arithmetic or pattern-based rule.
• The larger grid means more values to track before the rule becomes clear.
• No paper or calculator — do it in your head.

Why this matters

Scaling matrix reasoning to a 4×4 grid tests the same Perceptual Reasoning construct measured by the WAIS's Matrix Reasoning subtest, where item difficulty increases specifically by adding more elements to track at once, not by making any single rule harder. Read more about the Wechsler Adult Intelligence Scale (WAIS).

This game trains