A Mental Arithmetic

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American Book Company, 1897 - Mental arithmetic - 176 pages
 

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Page 173 - Square Measure 144 square inches (sq. in.) = 1 square foot (sq. ft.) 9 square feet = 1 square yard (sq. yd.) 30| square yards = 1 square rod (sq. rd.) 160 square rods = 1 acre (A.) 640 acres = 1 square mile (sq.
Page 174 - CUBIC MEASURE 1728 cubic inches (cu. in.) = 1 cubic foot (cu. ft.) 27 cubic feet = 1 cubic yard (cu. yd.) 128 cubic feet = 1 cord (cd...
Page 174 - Dry Measure 2 pints (pt.) =1 quart (qt.) 8 quarts = 1 peck (pk.) 4 pecks = 1 bushel (bu.) 2150.42 cu.
Page 174 - LIQUID MEASURE 4 gills (gi.) = 1 pint (pt.) 2 pints = 1 quart (qt...
Page 169 - A, B, and C can do a piece of work in 8 days ; B and C can do it in 12 days, and A and B in 10 days ; in how many days can each, working separately, doit?
Page 73 - If 7 men can do a piece of work in 4| days, how long will it take 1 man to do it ? How long will it take 3 men to do it ? 4.
Page 75 - If 4 men can do a piece of work in 8 days, how many men would it take to do the same work in 4 days ? 20.
Page 176 - In counting many kinds of articles we use these measures : 12 things = 1 dozen (doz.) 12 dozen = 1 gross (gr.) 12 gross = 1 great gross (G. gr.) 20 things = 1 score...
Page 175 - Centennial years exactly divisible by 400, and other years exactly divisible by 4, are leap years, when February has 29 days.
Page 86 - A can do a piece of work in 4 days, and B can do the same in 3 days. How long would it take both together to do it 1 Ans.

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