March 29, 2017

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Joel and jacob are brothers. This year both of their ages are prime numbers. Last year both of their ages were composite numbers.Both of their ages will be composite numbers again over the next three years. If joel and jacob are both teenagers, how old are they now?

  • math - ,

  • math - ,

    The only teen primes are 13 and 17 and 19

    17 is no good, since 18,19,20 are not all composite.

    So, they are 13 and 19

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