Fill a grid with symbols/numbers obeying adjacency or ordering rules

CAT has tested this idea 13 times across 3 papers, from 2018 to 2024. Solve one, and the others are the same method with different numbers or wording, which is why repeated concepts are the most efficient thing to practise.

Question	What it asks	Answer
CAT 2020 Slot 2 · DILR Q1	5x5 grid of red/blue/green beads, adjacency rules	2
CAT 2020 Slot 2 · DILR Q2	5x5 grid of red/blue/green beads, adjacency rules	9
CAT 2020 Slot 2 · DILR Q3	5x5 grid of red/blue/green beads, adjacency rules	6
CAT 2020 Slot 2 · DILR Q4	5x5 grid of red/blue/green beads, adjacency rules	6
CAT 2018 Slot 1 · DILR Q9	n x n matrix, no two adjacent cells share a numeral	4
CAT 2018 Slot 1 · DILR Q10	n x n matrix, no two adjacent cells share a numeral	4
CAT 2018 Slot 1 · DILR Q11	n x n matrix, no two adjacent cells share a numeral	A
CAT 2018 Slot 1 · DILR Q12	n x n matrix, no two adjacent cells share a numeral	A
CAT 2024 Slot 2 · DILR Q10	Numbers 1-10 in grid, rows increasing, columns decreasing	4
CAT 2024 Slot 2 · DILR Q11	Numbers 1-10 in grid, rows increasing, columns decreasing	A
CAT 2024 Slot 2 · DILR Q12	Numbers 1-10 in grid, rows increasing, columns decreasing	B
CAT 2024 Slot 2 · DILR Q13	Numbers 1-10 in grid, rows increasing, columns decreasing	2
CAT 2024 Slot 2 · DILR Q14	Numbers 1-10 in grid, rows increasing, columns decreasing	26

Part of Grids & Matrices (67 questions since 2017).