### Brain Teasers

# 1, 0, 3, 11, 15

1, 0, 3, 11, 15... What are the next two numbers in this series?

### Answer

13, 17. The series begins with the first number to have the least amount of letters in its name, starting with zero. (Ex. `1` has 3 letters in `one`, `0` has 4 letters in `zero`, `3` has 5 letters in `three`, `11` is the first number to have 6 letters in its name, 15 is the first to have 7 letters in its name...and so on). The series continues up to number 9. `13` is the first to have 8 letters and `17` is the first to have 9 letters.Hide Answer Show Answer

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