What this pattern means
A row or column resolves to 'what is in the first cell minus what is in the second cell.' Elements present in both parents cancel; elements present only in the first carry through. The solver must identify which cell is the minuend (kept) and which is the subtrahend (removed).
How to spot it
- Row 2 cells are clearly sparser than rows 0 and 1.
- Elements visible in both row-0 and row-1 cells consistently disappear from row 2.
- Elements visible in only one parent consistently survive.
Common visual signals
- Line- or dot-based questions where the bottom row drops elements.
- Group-counting questions where row 2 has fewer objects per category.
- A 'cancellation' feel: shared elements cancel, exclusive elements remain.
Step-by-step solving tactic
- 1List the elements in row-0 and row-1 cells of the column you're solving.
- 2Remove any element that appears in both.
- 3The remainder is the row-2 cell. Match it against the four options.
- 4If the result is empty or near-empty, double-check that addition (not subtraction) was not the intended rule.
Common traps
- Confusing subtraction with XOR — XOR also cancels shared elements but applies symmetrically.
- Subtracting in the wrong direction — row 1 minus row 0, not the other way.
- Missing partial categories — sometimes only one of several categories subtracts.
Related patterns
Apply this pattern under timed conditions
Take the free 10-question matrix reasoning practice test — every question carries the subtraction pattern or another commonly tested mechanic.