### Brain Teasers

# Sequencing the Stone...

A group of stones are all lined up. Upon closer inspection, you realize there are numbers on the stones, as follows:

1 - 2 - 3 - 5 - 9 - 12

The last stone has had its number worn off by wind and time, what should the number on the stone read?

1 - 2 - 3 - 5 - 9 - 12

The last stone has had its number worn off by wind and time, what should the number on the stone read?

### Hint

This is a logical sequence, not necessarily a mathematical one.### Answer

21one - two - three - five - nine - twelve - twenty-one

The words for the numbers end in vowels.

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