My birthday's in July each year,
The same date every time.
When my birthday is tomorrow,
The day before yesterday is prime.
Two weeks after my birthday
The date would always be
A very small square number
Added to a power of three.
If my birthday falls on Sunday
The next Saturday furthermore
Has a date with six factors
And is a multiple of four.
There are only two possibilities
The verses above create.
Choose the smaller of the two
To find my birthday date.
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I initially heard this book described on the Grammar Girl podcast and immediately went to find out more about it. I now have it on my Christmas present wish list and am looking forward to receiving a copy (hint!).
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