Answer:
B)53
Step-by-step explanation:
Given
6 7 13 20 33 [?] 86 139
The pattern of the sequence is given by adding previous number on the sequence + new answer to get the next answer
6 + 7 = 13
7 + 13 = 20
13 + 20 = 33
20 + 33 = 53
33 + 53 = 86
53 + 86 = 139
The next number on the sequence
86 + 139 = 225
139 + 225 = 364
And the pattern continues like that....