Homework Help: Math

Posted by Kris on Sunday, November 30, 2008 at 3:31pm.

I am a prime number between 40 and 50. If you add one to me, the sum of the prime factors of that composite number is 11. What number am I?

Math - Kris, Sunday, November 30, 2008 at 3:33pm
44
Math - Damon, Sunday, November 30, 2008 at 3:40pm
I must be one of:
41
43
47
so add 1
42
44
48
so
42 = 2*3*7 and sum = 11, remarkable
44=2*2*11 nope
48=2*2*2*2*3 nope
Math - Damon, Sunday, November 30, 2008 at 3:41pm
So I think 41

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