If 2 rectangles are divided in equal parts and 1/3of 1 is shaded and 1/4of the other is shaded. what is the least number of parts into wich both could be divided into

I believe it's 12 parts? Because 1 third would be 4/12 and 1 fourth would be 3/12.

Think of it as pie one is split into thirds and one split into fourths then combine them so you should have a pie split into sixths shade two of spaces (representing the one 1/3 and 1/4 so you should have 4/6 spaces left (2/3 left and 3/4 left) and boom your answer your welcom