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Solution to CyberTeaser B301

It's clear from the statement of the problem that Billy got more than 1/10 of all the fruit and less than 1/8. Therefore, he got 1/9 of all the fruit. So Mrs. Brown had nine grandchildren. This situation is possible, for example, if there were eight apples and ten pears in the bowl. In this case, eight children got one apple and one pear each, and one child got two pears. Other examples, with larger numbers of fruit, are also possible.

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