Question

If n is a term of the sequence 2, 5, 8, 11, ..., which expression would give the value of n?



2n+ 1
2n- 1
3n- 1
n+ 3

Answer 1

Think about this.
What adds to 2 to get 5, as well as getting from 5 to 8?

Answer 2

3n-1

Answer 3

3

Answer 4

3n-1

Answer 5

Yep, 3. So, n + 3 would be the correct answer here.

Answer 6

3n-1
e.g.
3(2)-1=5
this means there is a difference of 3 in each number

Answer 7

11 = 8(3) - 1
11 = 24 - 1
11 is not 23, so it doesn't work.