Three siblings share the same birthday. The youngest is half the age of the middle sibling, who is two years younger than the oldest. The sum of all three of their ages is 22. How old is the youngest sibling?
4 years old
Let Y be the youngest age. The middle sibling is 2Y, and the oldest is 2Y + 2. Adding them: Y + 2Y + (2Y + 2) = 22, which simplifies to 5Y + 2 = 22, so Y = 4.
About this riddle
Math riddles hide a calculation inside a short story. Pull out the numbers, work out what is being asked, and watch for a trick such as a unit change.
Difficulty: Medium. More like this: Math riddles with answers or try Target 24 for a different kind of puzzle.
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