Question

which sequence is geometric

1. 5, 15, 25, 35

2. 5, 10, 20, 40

3. 6, 12, 18, 24

4. 7, 14, 21, 28

Answer 1

Number 2 is geometric.

We know this because it multiplies by the same number each time.

5 x 2 = 10, 10 x 2 = 20, 20 x 2 = 40, and so on