Math Puzzles for the Clever Mind

Give your mind a mathematical workout.Test, prod, and stretch your wits to the outer limits. Even if you're extra clever, you might get stumped, but we guarantee you'll enjoy every minute of it Sharpen your smarts on a combination of original puzzles, and classic teasers with new twists. Some have [...]
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Give your mind a mathematical workout.Test, prod, and stretch your wits to the outer limits. Even if you're extra clever, you might get stumped, but we guarantee you'll enjoy every minute of it Sharpen your smarts on a combination of original puzzles, and classic teasers with new twists. Some have surprising answers, but none involve advanced math. Try this one:
Many years ago, a farmer had 200 shekels with which to purchase 100 animals. Cows cost 20 shekels apiece, pigs cost 6 shekels apiece, while a sheep could be purchased for a single shekel. Assuming that he had to purchase at least one of each of the three animals, and assuming that he had to use all of his money, how many of each kind of animal did he purchase?