A bag contains red, blue, and green marbles. There are 24 in total. There are twice as many blue marbles as red ones, and three times as many green marbles as red ones. How many red marbles are there?
4
Let red be x. Blue is 2x, green is 3x. Total = x + 2x + 3x = 6x = 24. Therefore, x = 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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