In one of my CSET test prep books, the following problem is posed:
Let a, b represent positive integers less than 19 for which 19 = a
(mod 3) and 27 = b (mod 4). What is the maximum value of a - b?
The equal sign used here stands for a three-lined equal sign in the
book, but my computer cannot produce such a siglum.
How does the (mod 3) and (mod 4) affect the equivalence sign?
Thanks in advance,
Henrysun909
