Pat counts her sweets in different groups and both times she has some left over. How many sweets could she have had?
An odd version of tic tac toe
In how many different ways can you break up a stick of 7 interlocking cubes? Now try with a stick of 8 cubes and a stick of 6 cubes.
My ones digit is twice my tens digit.
My digits add up to an even number.
What am I?