In a certain series, each term is m greater than the previous term. If the 16th term is 660 and the 13th term is 600, what is the first term?	Choose the correct choice from the following.
A) 120	B) 180	C) 360	D) 300	E) 360
a + 15m = 660 (16th term)   a + 12m = 600 (13th term)   You get a = 360 and m = 20   Answer:360
<result>C</result>
In a certain series, each term is m greater than the previous term. If the 16th term is 660 and the 13th term is 600, what is the first term?