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Question
Find the missing term: 1, 2, 6, 7, 21, 22, 66, 67, ?
Options:
A .  70
B .  134
C .  201
D .  301
Answer: Option C
The pattern is + 1, × 3, + 1, × 3, + 1, × 3, + 1,............. So, missing term = 67 × 3 = 201

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