Siblings

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How old are the twins and their younger brother?

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Prime Factor Sums

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Find numbers whose prime factors equal a certain sum.

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Judy’s Gift

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How much money did Judy give Dave?

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Counterfeit Coin

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Find the counterfeit coin.

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Counting Zeros

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Determine the number of zeros at the end of a particular factorial.

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Cooking an Egg

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How could you cook eggs for 15 minutes if you do not have a 15-minute timer?

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Factoring Days

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Is today’s date a factor of this month?

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Dividing Primes

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Which numbers are divisible by all three of the smallest prime numbers?

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Heavy Reader

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How many pages did Alexis read?

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Using up Digits

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Can you find a multiplication sentence using the digits 1, 2, 3, 4, 5, and 6 such that the product is closest to a certain number?

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