In the above number, A and B represent the tens and units digits, respectively. If the above number is divisible by 15, what is the greatest possible value of B x A? Pick one
A) 0 B) 15 C) 25 D) 30 E) 35
I also was confused when I was looking forabove number:D   As far as I understood, 15 is a factor of AB. In other words, the values of B (units digits can be 5 or 0. Better to have option for 5 in this case to havebigger result). Now let's try 15x1 (A=1, B=5 respectively we have =5). To ensure, let's check (avoid even multiples of 2,4,6,8 etc (we will have 0 in units thus making our result 0)   15x3 = 45 (A=4 B=5 respectively. Hey! that's 20. But we don't have this number in answer choices, move on).   15x5= 75 (A=7, B=5 respectively. Increasing trend , we have 35 now)   15x7= 105 (A=0, B=5. Have 0 now. can create a pattern)   IMO 35.
<result>E</result>
In the above number, A and B represent the tens and units digits, respectively. If the above number is divisible by 15, what is the greatest possible value of B x A?