Divide 247 by 6 in your head or on your calculator (in your head,
you’re finding the number closest to 247 that is divisible by 6).
You know that 6 goes into 240 evenly, so it also must go into 246.
That means the remainder (r) is 1. You also know that 12 goes into
240, but does not go into anything else until 252. Therefore the
remainder of
247 / 12 = 7. So 1 – 7 = -6 (A).