Question

barb is making a bead necklace. She strings 1 white bead , then 3 blue beads , then 1 white bead, and so on. Write the numbers for the first eight beads that are white. What is a rule for the pattern ?

Answer 1

1,5,9,13,17,21,25,29

rule= +4

Explanation:

Answer 2

The first eight beads that are white are: 1,5,9,13,17,21,25,29

The rule for the pattern is. if n is a number of bead that is white, the next number of bead that is white is n+4

Explanation:

The first beads are:

bead color

1 w

2 b

3 b

4 b

5 w

6 b

7 b

8 b

where w refers to white and b to blue

If n is a number of bead that is white, the next number of bead that is white is n+4. We know that the first bead is white (n = 1), then the bead n = 1 + 4 = 5 is also white. Therefore, the bead n = 5 + 4 = 9 is white and so on. The first eight beads that are white are: 1,5,9,13,17,21,25,29 .