Suppose a pie to be exactly round and 10-1/2 miles in diameter. If it were cut into 6 equal pieces, how long would the curved edge of each piece be? 8-1/3% of a class of 36 boys were absent on a rainy day. 33-1/3% of those present went out of the room to the school yard. How many were left in the room? Just after a ton of hay was weighed in market, a horse ate one pound of it. What was the ratio of what he ate to what was left? If a fan having 15 rays opens out so that the outer rays form a straight line, how many degrees are there between any two adjacent rays? One half of the distance between St. Louis and New Orleans is 280 miles more than 1/10 of the distance; what is the distance between these places? If the pressure of the atmosphere is 14.7 lb. per square inch what is the pressure on the top of a table 1-1/4 yd. long and 2/3 yd. wide? 13/28 of the total acreage of barley in 1900 was 100,000 acres; what was the total acreage? What is the least number of bananas that a mother can exactly divide between her 2 sons, or among her 4 daughters, or among all her children? If Alice were two years older than four times her actual age she would be as old as her aunt, who is 38 years old. How old is Alice? Three men walk around a circular island, the circumference of which is 360 miles. A walks 15 miles a day, B 18 miles a day, and C 24 miles a day. If they start together and walk in the same direction, how many days will elapse before they will be together again? With only thirty or forty dollars a year to spend on a pupil's education, of which perhaps eight dollars are spent on improving his arithmetical abilities, the immediate guidance of his responses to real situations and personally initiated problems has to be supplemented largely by guidance of his responses to problems described in words, diagrams, pictures, and the like. Of these latter, words will be used most often. As a consequence the understanding of the words used in these descriptions becomes a part of the ability required in arithmetic. Such word knowledge is also required in so far as the problems to be solved in real life are at times described, as in advertisements, business letters, and the like.