This is a very ingenious puzzle and should be performed with small counters of two different colors Three jealous husbands, with their wives, having to cross a small stream, find a boat without an owner, which is only sufficiently large to carry two persons at a time. Wanted to know, - how the six persons can transport them selves over the river in pairs, so that no woman shall be left in company with any of the men unless her husband is present.

Answer. - At first two wives cross the river, then one returns and takes over the remaining wife, after which she recrosses, and stays with her husband, and the two husbands cross over. Then a husband and wife come back, and the two husbands cross. Then the wife returns and takes over one of the others, and lastly the husband of the remaining one comes back for his wife. (See 2435.)