Pat counts her sweets in different groups and both times she has
some left over. How many sweets could she have had?
I am less than 25. My ones digit is twice my tens digit. My digits add up to an even number.
An odd version of tic tac toe
If you don't have a partner to work with, you could use the interactivity below. The computer selects one digit at random. You must then choose a digit to make the largest possible two-digit even number or largest possible two-digit odd number.