







The sum of the digits of twodigit number is 9 
20080701 

From Audrey: the sum of the digits of twodigit number is 9. if the digits are reversed, the new number if 63 greater than the original number. find the number. Answered by Penny Nom. 





A twodigit number is five times its units digit. 
20070221 

From Pamela: A twodigit number is five times its units digit. If the digits are reversed, the resulting number is 27 more than the original number. Find the original number. Answered by Gabriel Potter and Penny Nom. 





Four twodigit numbers 
20061202 

From Mary: I have four twodigit numbers written on my paper. The sum of these 4 numbers is less than 100.
True or False  each number is less than 25
If all the numbers on my paper are different, what is the largest (twodigit) number I could possibly have written. Answered by Stephen La Rocque. 

