Coffee, Please!

Sandy Wood
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Today's mentalfloss.com Think Thursday Brain Game challenge is one we first offered, oh, about four years ago. Let's see if it's improved with age:

What's the next number in this sequence? 2, 3, 10, 12, 13, 20, 21, ?, ...

Here is my SOLUTION. 


SOLUTION:

22. They're the whole numbers that, when spelled out, begin with the letter "T."

Thanks for playing!

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