SOME CRYPT
ARITHMETIC HINTS
1)
READ THE PROBLEM! THEY MAY NOT BE ASKING FOR ALL THE
LETTERS, OR ONLY SOME NUMBERS ARE ALLOWED.
2)
IN THIS SITUATION
XXX
+XXX
----
NXXX
N=1 (The number sticking out is 1)
3)If F + 1 generates a carry, F=9
4)EVERY LETTER STANDS FOR A DIFFERENT
NUMBER, EVERY NUMBER IS A DIFFERENT LETTER. THIS CAN SOMETIMES REDUCE THE
NUMBER OF GUESSES YOU NEED TO MAKE, BECAUSE SOME NUMBERS ARE ALREADY "USED."
5) SAME_NUMBER + SAME_NUMBER = 2 X
SAME_NUMBER = EVEN_NUMBER. FOR EXAMPLE,9+9=18, YOU WRITE 8, AN EVEN NUMBER, AND CARRY 1.
6) JUMP TO THE LAST COLUMN, BECAUSE
THERE ARE NO CARRIES TO WORRY ABOUT.
7) IF YOU GET TO A DEAD END,BACK
UP!
