Tantalizer 421: Present time
18 September 2019
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From New Scientist #971, 16th October 1975 [link]
“I say”, said young Tommy on Christmas morning, when we had each seen our own presents but no one else’s, “here is a poser based on the tea-strainer, bath hat, bath soap and gloves I gave Jane, Kate, Lucy and Maud. I shall now put three questions and each of the girls must give at least two true answers out of the three”.
He first asked, “Did I give you the tea-strainer?” and got the answers: Yes, Yes, No, No. Then he asked: “Did I give you something for the bath?”, getting the answers: Yes, No, Yes, No. The he asked: “Did I give you something to wear?”, getting the answers: No, Yes, Yes, Yes. (Answers are in alphabetical order of girls).
“Now”, he said to the rest of us, “I can tell you that exactly one girl is in a position to deduce what each other girl got. Can you tell me what each girl did get?”
Due to a typo in New Scientist this puzzle was published as Tantalizer No 42.