Three siblings—Leo, Mia, and Sam—share 16 cookies. Leo has 2 more cookies than Mia. Sam has 1 fewer cookie than Mia. How many cookies does Leo have?
7 cookies
Let Mia have M cookies. Leo has M + 2, and Sam has M - 1. Sum: (M + 2) + M + (M - 1) = 3M + 1 = 16. Solving 3M + 1 = 16 gives 3M = 15, so M = 5. Therefore, Mia has 5 cookies, Sam has 4, and Leo has 5 + 2 = 7 cookies.
About this riddle
Logic riddles give you a few facts and ask what must be true. List what you know, cross out what cannot be, and see what is left.
Difficulty: Easy. More like this: Logic riddles with answers or try Einstein's Logic Grid for a different kind of puzzle.
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