Blake and Tatsu are each assigned a paper for a class they share. Blake decides to write 4 pages at

Blake and Tatsu are each assigned a paper for a class they share. Blake decides to write 4 pages at a time while Tatsu decides to write 7 pages at a time. If they end up writing the same number of pages, what is the smallest number of pages that the papers could have had?

We want the least common multiple of 4 and 7, written as LCM(4, 7). Using our LCM Calculator, we get:
LCM(4, 7) = 28 pages