What is the sum of the different positive prime factors of 550 ?
A 10
B 11
C 15
D 16
E 18
I have no idea when trying to understand the question .....
Thanks
prime factors ...
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IMO 18 it's asking for the sum of the DIFFERENT prime factors of 550. brake it down into factor 5*5*2*11. the only DIFFERENT ones are 5,2,11. add them up to get 18.
hope it helps...
hope it helps...