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

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asked Apr 7, 2018 73.5k views

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Shurdoof · Answer 1 · 2018-04-11T20:31:18+0000

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.

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

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