Description

Diagram of a matching exercise with two ovals, each containing four numbers stacked vertically. The numbers in the first oval are 1, 5, 7 and 9. The numbers in the second oval are 1, 2, 3 and 4. Arrows moving from the first to the second oval indicate matching numbers. 1 matches with 2; 5 matches with 3; 7 matches with 1; and 9 matches with 4.