Math homework- no pattern?

Question

Find a rule that changes each number in the top row into the number below. Use the rule to fill in the missing numbers.

2 3 4 6 8 9
3 5 _ 11 _ _

Answer 1

The correct pattern is: n + (n-1)

If n = 2, then 2 + (2-1) = 3

If n = 3, then 3 + (3-1) = 5

If n = 4, then 4 + (4-1) = 7

If n = 6, then 6 + (6 - 1) = 11

If n = 8, then 8 + (8-1) = 15

Now you can do the last one!

Best wishes and good luck.

Answer 2

x+ 1 = 2 + 1 = 3
x+2 = 3+2=5
x+3= 4+3=7
x+4 6+4 = 11
x+5 8+5= 13
etc..