Series pattern
39 + 1 x 13 = 52
52 + 2 x 13 = 78
78 + 3 x 13 = 117
117 + 4 x 13 = 169

Correct Option: C

Series pattern
39 + 1 x 13 = 52
52 + 2 x 13 = 78
78 + 3 x 13 = 117
117 + 4 x 13 = 169
169 + 5 x 13 = 234 Should come in place of ?

1 x 1 + 1 = 2
2 x 2 + 2 = 6
6 x 3 + 3 = 21
21 x 4 + 4 = 88
88 x 5 + 5 = 445

Correct Option: B

1 x 1 + 1 = 2
2 x 2 + 2 = 6
6 x 3 + 3 = 21
21 x 4 + 4 = 88
88 x 5 + 5 = 445
445 x 6 + 6 = 2676 Should come in place of '?'

Series pattern
600/5 + 5 = 125
125/5 + 5 = 30
30/5 + 5 = 11
Should come in place of '?'
11/5 + 5 = 7.2

Correct Option: D

Series pattern
600/5 + 5 = 125
125/5 + 5 = 30
30/5 + 5 = 11
Should come in place of '?'
11/5 + 5 = 7.2
7.5/5 + 5 = 6.44
6.44/5 + 5 = 6.288

Series pattern
12 x 2 = 24
24 x 3 = 72
72 x 2 = 144
144 x 3 = 432

Correct Option: C

Series pattern
12 x 2 = 24
24 x 3 = 72
72 x 2 = 144
144 x 3 = 432
432 x 2 = 864
Should come in place of '?'

Series pattern
50 x 1.2 = 60,
60 x 1.25 = 75,
75 x 1.3 = 97.5,
97.5 x 1.35 = 131.625

Correct Option: C

Series pattern
50 x 1.2 = 60,
60 x 1.25 = 75,
75 x 1.3 = 97.5,
97.5 x 1.35 = 131.625 Should come in place of '?'
131.625 x 1.4 = 184.275
184.275 x 1.45 = 267.19875