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July 29, 2014

July 29, 2014

Posted by **mathrocks** on Monday, September 14, 2009 at 10:37am.

- math -
**bobpursley**, Monday, September 14, 2009 at 10:41am315 is first divisible by 5. I assume you know the divisibility rules.

61*5

Next, 61. Isn't that prime?

http://www.icteachers.co.uk/children/sats/primes.htm#1

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