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1, 2, 3, … , 20
a) 20
b) 19
c) 21
d) 18
1, 3, 5, …, 29
a) 15
b) 29
c) 30
d) 16
2, 4, 6, …, 50
a) 25
b) 26
c) 50
d) 49
1, 5, 9, …, 41
a) 11
b) 10
c) 41
d) 40
5, 10, 15, … , 155
a) 31
b) 32
c) 33
d) 34
100, 98, 96, … , 60
a) 21
b) 20
c) 22
d) 24
50, 47, 44, … , 23
a) 10
b) 11
c) 12
d) 13
0, -10, -20, … , -400
a) 41
b) 40
c) 42
d) 43
0.3, 0.6, 0.9, ..., 4.8
a) 16
b) 13
c) 14
d) 15
1.1, 2.2, 3.3, ..., 24.2
a) 22
b) 23
c) 24
d) 21
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