< Puzzles < Easy Sequence 8
This series is represented by the months. If the month has 31 days, it gets a one. If not, it gets a zero.
| Month | January | February | March | April | May | June | July | August | September | October | November | December |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Length | 31 | 28 or 29 | 31 | 30 | 31 | 30 | 31 | 31 | 30 | 31 | 30 | 31 |
| Sequence | 1 | 0 | 1 | 0 | 1 | 0 | 1 | 1 | 0 | 1 | 0 | 1 |
Alternatively, it can be described as the remainder after dividing by 2 of the length of each month in a common year (as opposed to a leap year).
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