13. Task $\Gamma$. Dudeney. If one and a half chickens lay one and a half eggs in one and a half days, then how many chickens plus another half chicken, laying eggs one and a half times faster, will lay ten eggs and a half in one and a half weeks?
13.If one and a half chickens lay one and a half eggs in one and a half days, then one chicken will lay one egg in one and a half days. A chicken that "works" one and a half times faster will lay one and a half eggs in one and a half days (one egg per day). Therefore, this chicken will lay ten and a half eggs in ten and a half days (one and a half weeks). Answer: half a chicken.