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This problem trains for: SAT-I, AMC-8, GMAT, Math Kangaroo 3-4, Math Kangaroo 5-6.

The brave little tailor has a length of fabric that totals 90 yards. Every day, he cuts off an 18 yard length. If he started on a Monday, on which day did he make the last cut?

(character from Brothers' Grimm "The Brave Little Tailor")

This is a false direct proportionality problem. One has to notice that though:

this number represents the total number of smaller pieces, not the number of cuts that must be made.

To cut an object in 5 pieces only 4 cuts must be made!

Thus, the tailor makes the last cut on the 4th day,a Thursday if we count from Monday on.