Madeline has 5 boxes with 24 crayons in each. She noticed that 5/8 of the crayons in the 2 boxes were not yet used. In the 2 other boxes, only 2/3 of the crayons were used while the last box was not entirely used. How many unused crayons did Madeline have?
Let's be accurate as possible. Think before you answer.
70
Two boxes of crayons have 24 x 5 / 8 = 15 unused crayons from each box.

So, a total of 15 x 2 = 30 unused crayons are in the two boxes.

For the other 2 boxes, there are 24 x 2 / 3 = 16 used crayons from each box.

Hence, there are 24 - 16 = 8 unused crayons.

So, a total of 8 x 2 = 16 unused crayons are in the other two boxes.

Therefore, Madeline has a total of 30 + 16 + 24 = 70 unused crayons.

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The answer is 70