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View Full Version : Can you find the digit that makes each number divisible by 9? 54,78


jmaupin
Nov 4, 2010, 03:20 PM

jmaupin
Nov 4, 2010, 03:21 PM

ballengerb1
Nov 4, 2010, 03:22 PM
Can you find a way pof restating this question? There is no single DIGIT that answers this question but there might be a 3 or 4 digit number

galactus
Nov 4, 2010, 04:33 PM
What do you mean? Do you have to enter a number to the end of, say, 42 and create a three digit number divisible by 9?

If so, note that a number is divisible by 9 if the sum of its digits is divisible by 9.

Thus, if we had 3 to 42 to get 423, the sum of the digits (4+2+3=9) is divisible by 9, therefore, so is 423 divisible by 9.