Name the national capital cities located between the latitudes of Madrid (40.38) and Cairo (30.05)
Baku is also at 40.38, so it misses the cut.
Also try these longitude based quizzes, http://www.jetpunk.com/user-quizzes/170770/capitals-between-london-and-berlin and http://www.jetpunk.com/user-quizzes/170770/capitals-between-moscow-and-new-delhi