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5 December, 19:49

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

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  1. 5 December, 20:17
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    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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