A sobering problem from Gerald Lynton Kaufman’s Book of Modern Puzzles, 1954:

If a GLEEPER is as long as two PLONTHS and a half-GLEEPER, and a BLAHMIE is as long as two GLEEPERS and a half-BLAHMIE, and a POOSTER is as long as two BLAHMIES and a half-POOSTER, then how many PLONTHS long is a half-POOSTER?

“It may help you to make a sketch.”