Question

Identify the pattern rule for this sequence: 20, 80, 40, 160, 80, 320…

multiply by 4, divide by 2

multiply by 4, divide by 20

add 60, subtract 40

multiply by 4, subtract 40

Answer 1

Multiply by 4, divide by 2

Explanation:

The pattern is multiply by 4 and divide by 2.

20 * 4 = 80 and 80 / 2 = 40

40 * 4 = 160 and 160 / 2 = 80

Finally, 80 * 4 = 320, etc.