What is the remainder when 1273 * 1275 * 1277 *1285 is divided by 12?
Select:
A) 9  B) 1  C) 11  D) 0  E) 7
1271*1275*1277*1285 = (1272 + 1)(1272 + 3)(1284 - 7)(1284 + 1) = (multiple of 12 - 1)(multiple of 12 + 3)(multiple of 12 - 7)(multiple of 12 + 1)   Now, if we expand this expression all terms but the last one will have a multiple of 12 in them, thus will leave no remainder upon division by 12, the last term will be (1)(3)(-7)(1) = 21. Thus the question becomes: what is the remainder upon division of 21 by 12? The answer to this question is 9.   9nswer: 9
<result>A</result>
What is the remainder when 1273 * 1275 * 1277 *1285 is divided by 12?