By C. R. Wylie Jr.
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Extra resources for 101 Puzzles in Thought and Logic (Math & Logic Puzzles)
Mary is older than her partner. Alice and Grace are together older than Helen and Mary. 28 Among one hundred applicants for a certain technical position it was discovered that ten had never taken a course in chemistry or in physics. Seventy-five had taken at least one course in chemistry. Eighty-three had taken at least one course in physics. How many 0/ the applicants had had some work in both chemistry and physics? 29 The following is a portion of a report submitted by an investigator for a well-known market analysis agency with standards of accuracy so high that it boasts that an employee's first mistake is his last.
Everything of course is closed on Sunday. One afternoon Mrs. Abbott, Mrs. Briggs, Mrs. Culver, and Mrs. Denny went shopping together, each with a different place to go. On their way they dropped the following remarks: Mrs. Abbott: Mrs. Denny and I wanted to go earlier in the week but there wasn't a day when we could both take care of our errands. Mrs. Briggs I didn't want to come today but tomorrow I couldn't do what I have to do. Mrs. Culver: I could have gone yesterday or the day before just as well as today.
Four would eat neither spinach nor carrots, three would eat neither spinach nor beans, and two would touch neither carrots nor beans. One of the children wouldn't eat spinach, carrots, or beans. And none would eat all three of the vegetables. How many children were there in the family? 32 In a certain apartment house occupied exclusively by young married couples and their children the following facts are known to be true. There are more children than adults, more adults than boys, more boys than girls, and more girls than families.
101 Puzzles in Thought and Logic (Math & Logic Puzzles) by C. R. Wylie Jr.