Answer:
22
Step-by-step explanation:
4, 4, 10, 10, 16, 16
Change between 4 and 4? 0. Change between 4 and 10? 6. Change between 10 and 10? 0. Change between 10 and 16? 6, etc
16 + 6 = 22
Hence the next number that (I think) is next in the sequence
Hope this helps, have a nice day :)
