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152. A and B can build # of it in I day; A, B, and Coan build 4 of it in 1 day, the difference between ond is ; ; therefore C can build or of it in 1 day; and it would take him 134 days to build it alone. * 164. Find how much they might eat in a day, in order to make it last 1 month, and then it will be easy to find how much they may eat in a day to make it last 11 months. 167. The money is 7 parts of the whole, and the purse one part ; consequently the money is #, and the purse # of 16. 170. He gave 1 part for the apple, 2 parts for the orange, and 4 parts for the melon. These make 7 parts. The apple 3 cents, the orange 6 cents, and the melon 12 cents. 175. If to a number half of itself be added, the sum is # of that number ; hence, subtract 2% from 100 and the remainder is ; of the number of geese that he had. 180. This must be reduced to 6ths. I half is #, and 4 is #, and the number itself is #. If therefore to the whole number its half and its third be added, the sum will be "o ; hence, 77 is of the number. 181. 4 is #; therefore if to a number # and # of itself be added, the whole number will be #; but when 18 more is added to 4, the first number is doubled; that is, the number is # of the first number; therefore 18 is + of the number

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