Answer - Week 13 - Thursday
02-Apr-12
What number should replace the question mark in this sequence?
8 17 69 ? 3321 33211
Answer: 415. Multiply by 2 and add 1, then multiply by 4 and add 1, then multiply by 6 and add 1 and so on.
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- Author:
- Puzzle Editor
- Publisher:
- British Mensa
- Date:
- 02-Apr-12
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