Find tenth term of the sequence (1,1,2,3,5,8,13)

This is what we call a Fibonacci sequence:

Notice that after the 1,1:

4th term = 3 = = > 2+1

5th term = 5 = = >3+2

6th term = 8==> 5+3

7th term = 13==> 8+5

8th term = ... 13+8 = 21

9th term = ... 21+13 = 34

10t=h term = ... 34+21 = 55

In short each number equal the sum of the 2 preceding number