"Oh, say, Bobbie, quit that algebra and come on out You've stuck at it a full hour already. What's the use of cramming any more? You'll get through the exam all right; you know you always do," protested Van Blake as he flipped a scrap of blotting paper across the study table at his roommate. Bob Carlton looked up from his book. "Perhaps you're right, Van," he replied, "but you see I can't be too sure on this stuff. Math isn't my strong point, and I simply must not fall down on it; if I should flunk it would break my father all up."