Must be 10. Pattern: +3 -2 +3 -2
Answer is 10 13 there two series 1st 7 8 9 10 2nd 10 11 12 13
10 it is easy and 100 percent correct
there two series 1st 7 8 9 10 2nd 10 11 12 13 so the answer is 10 and 13