15
44
44
25-1=24 24-2=22 22-3=19 19-4=15 15-5=10 The next number in the series is 10.
20
15
The next number in the series 10, -5, 25, -35, 85, -155 is:
44
44
The next number in the series 1 2 4 8 10 20 22 is
550
22
25-1=24 24-2=22 22-3=19 19-4=15 15-5=10 The next number in the series is 10.
20
12
20
39