Brain Teasers

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Teaser 1

Each of the fruits in the diagrams below are equal to one of the following whole numbers: 1, 2, 3, or 5. Find the value of each fruit so that both of the equations would be correct.

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If you had to write down all of the whole numbers between 1 and 100, how many times would you have to write the number 8?

Teaser 2

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Teaser 3

If all of the whole numbers from 0 to 100 were arranged alphabetically, which number would come first? Which number would come last?

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I am an odd number. Take away one letter and I become even. What number am I?

Teaser 4

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Teaser 5

I have 4 times more red balls than green; I have 6 more blue balls than green; I have 60 balls in total. How many red, green and blue balls do I have?

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Teaser 6

Move just 1 matchstick to make a correct sum! There are many different ways to do this.