Question

enter the number of tiles needed to make 4 trays. white tiles black tiles 5 4 10 8 15 12 ? ×4 ×4

Explanation:

Step1: Analyze Black Tiles Pattern

Observe the black tiles: 4, 8, 12. The pattern is multiplying by 2? Wait, no, for 1 tray: 4, 2 trays: 8 (4×2), 3 trays: 12 (4×3). So for n trays, black tiles = 4n. For 4 trays, 4×4 = 16? Wait, or check the table: each row is 1,2,3 trays? Wait, first row: 5 white, 4 black (1 tray?), second: 10,8 (2 trays), third:15,12 (3 trays). So for 4 trays, multiply each by 4. Black tiles for 1 tray:4, so 4×4=16.

Step2: Verify with Multiplication

From the table, the black tiles column: 4, 8, 12. The common factor is 4 (4×1, 4×2, 4×3). So for 4 trays, it's 4×4 = 16.

Answer:

16