4. What number is missing from the following sequence - 7, 8, 5, 5, 3, 4, 4, 6, _, 7, 8, 8?
Think of something that is very well-known that consists of the same number of items as there are numbers (including the missing one) in this question.
From Quiz A Hodge Podge of Brain Teasers
Answer:
9
Number of letters in the months of the year when written as words, starting at January. September is the "missing" month, and this contains 9 letters when written as a word.
January (7), February (8), March (5), April (5), May (3), June (4), July (4), August (6), September (9), October (7), November (8), December (8).