<p>If m is the greatest prime factor of 38 and n is the greatest prime factor of 100, what is the value of m+n???
A.7
B.12
C.24
D.29
E.44</p>
<p>first get the factors of 38- 1x38, 2x19… notice that 19 is the greatest prime factor of 38.
same for 100- 1x100…5x20…notice that 5 is the greatest prime factor of 100</p>