Easy
1, 4, 6, 12
4+6 = 10
10 divided by 2 = 5
Answer = 5
15, 18, 22, 37, 70
22
1,1,2,3,3
2
10 18 11 34 100
18
10, 20, 40, 60
20 + 40 = 60
60 divided by 2 = 30
Answer = 30
45, 60, 80, 121, 390
80
2, 5, 7, 9, 15
7
76 23 1 0
12
100, 200, 600, 900
200 + 600= 800
800 divided by 2 = 400
Answer = 400
34, 45, 56, 67, 78
56
11, 15, 19, 22, 26
19
1000 700 250 950 100
700
80, 100, 300, 450
100 + 300 = 400
400 divided by 2 = 200
Answer = 200100, 200, 400, 500, 600
400
50, 70, 90, 100, 200
90
50 20 70 10
37.5
500, 1000, 7000, 8500
1000 + 7000 = 8000
8000 divided by 2 = 4000
Answer = 4000
78, 89, 100, 140, 150
100
100, 300, 500, 700, 900
500
6 4 1 2 9
4.4