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24-02-2017
Mathematics

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When the first 2005 positive odd primes are multiplied together what is the units digit of the product

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newing7 newing7

24-02-2017

If you take the first 3, 2x5x7 = 70, you notice that it ends in zero, because of the two and the five, so no matter how many more prime numbers you multiply by, the units digit (ones place) will always be a zero.

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