A farmer has pigs and ducks in a barn. Counting together, there are 20 heads and 56 legs. How many pigs are in the barn?
8 pigs
If all 20 animals were ducks, there would be 40 legs. Each pig adds 2 extra legs. 56 total legs - 40 base legs = 16 extra legs. 16 / 2 = 8 pigs (and 12 ducks).
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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