There's a song called "Twistification" which appears on page 316 of Lomax's "Folksongs of North America". The chorus is:

Five times five is tewnty five,
Five times six is thirty,
Five times seven is thirty five,
Five times eight is forty,
Five times nine is forty five,
Five times ten is fifty,
Five times eleven is fifty-five,
Five times twelve is sixty.

The tune is Charley Over the Water or Over the River Charley.