Answer:
32
Step-by-step explanation:
the pattern of sticks from the first 3 diagrams is
7 , 12 , 17 ,..
note the pattern increases by 5 each time , then continue by adding 5 to the previous value.
4th = 17 + 5 = 22
5th = 22 + 5 = 27
6th = 27 + 5 = 32
