Looking at the pdf that has the similar questions, I suppose the answer is “any multiple of twelve” because twelve can be divided evenly 4 ways, and 6 ways, and is the least number that can be so divided.
It’s kind of funny, since the implication is that she isn’t sure if she has four friends or six friends! Plus, who cares if there are stickers left over?
All these questions seem to be oriented towards testing comprehension of abstract number concepts ( LCM in particular ) in terms of “practical” problems. Nothing so very wrong with it I guess. As an aged math nerd I find them very amusing.
In 0bama’s Amerikkka, mathematics, like policy, is based on the lowest common denominator.