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J the middle term. A. \$853^. 74. If 12 men do a piece of work in 12£ days, how many men will do the same in GJ days ? A.
Practical and Mental Arithmetic on a New Plan: In which Mental Arithmetic is ... - Σελίδα 180
των Roswell Chamberlain Smith - 1833 - 268 σελίδες
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## Arithmetic on the Productive System: Accompanied by a Key and Cubical Blocks

Roswell Chamberlain Smith - 1843 - 312 σελίδες
...yds. wide will make a cloak, how many yds. f of a yd. wide will make the same cloak? A. 10yds. 19. If 12 men do a piece of work in 12| days, how many men will do the same in 65 days ? A. 24 men. 20. A merchant owning f of a vessel, sells f of his share for \$500; what was the...

## ARITHMETIC ON THE PRODUCTIVE SYSTEM

ROSWELL C. SMITH - 1850
...yds. wide will make a cloak, ho^ many yds. f of a yd. wide will make the same cloak? A. 10yds. 19. If 12 men do a piece of work in 12| days, how many men will do the same in 6| days 1 A. 24 men. 20. A merchant owning f of a vessel, sells f of his share for \$500 ; what was...

## Bradbury's Eaton's Practical Arithmetic, Combining Oral and Written Exercises

...a wall 400 feet long, 4 feet high, and 8 feet thick ? 514. If 14 men, working 8 hours each day, can do a piece of work in 12 days, how many men will do the same amount of work in 16 days, if they work 7 hours each day? 515. If 36 men, in 20 days of 10 hours each,...

## Wentworth & Hill's Examination Manuals: No. I. Artihmetic

George Albert Wentworth - 1884 - 140 σελίδες
...fast. What will be the true time when the clock strikes 4 on Thursday afternoon ? 4. If 20 men can do a piece of work in 12 days, how many men will do another piece of work six times as great in -fa of the time ? 5. If 5 per cent be lost by selling an...

## Exercises in Arithmetic

...fast. What will be the true time when the clock strikes 4 on Thursday afternoon ? 4. If 20 men can do a piece of work in 12 days, how many men will do another piece of work six times as. great in Ts¥ of the time ? 5. If 5 per cent be lost by selling...

## The Werner Mental Arithmetic

Albert Newton Raub - 1894 - 158 σελίδες
...3 men can do a piece of work in 10 days, how long will it take 5 men to do the same work ? 9. If 4 men do a piece of work in 12 days, how many men will be required to do it in 8 days? 10. A watch and a chain cost \$140 ; how much does each cost if the...

## Bradbury's Practical Arithmetic: Combining Oral and Written Exercises

William Frothingham Bradbury - 1895 - 377 σελίδες
...a wall 400 rods long, 4 feet high, and 8 feet thick 1 514. If 14 men, working 8 hours each day, can do a piece of work in 12 days, how many men will do the same amount of work in 16 days, if they work 7 hours each day? 515. If 36 men, in 20 days of 10 hours each,...

## Bradbury's New Elementary Arithmetic: Comprising Oral and Written Work

William Frothingham Bradbury - 1895 - 182 σελίδες
...cloth for 8 tons of coal worth \$5 a ton, what do I receive a yard for my cloth ? 138. If 4 men can do a piece of work in 12 days, how many men will it take to do the same work iu 8 days? 139. How many barrels of flour at \$6 a barrel can be bought...

## Mental Arithmetic

Edward Weidenhamer - 1896 - 173 σελίδες
...42. The sum of two numbers is 78, and their difference is 14. What are the numbers? 43. If 6 men can do a piece of work in 12 days, how many men will it take to do 3 times as much work in 24 days? 44. I traded 20 .chickens., worth 40 cents each, for...

## Lippincott's Mental Arithmetic: Embracing the Principles of Analysis and ...

James Morgan Rawlins - 1899 - 185 σελίδες
...flour, at \$6J a barrel, must be given in exchange for 50 barrels of apples worth \$6 a barrel ? 23. If 4 men do a piece of work in 12 days, how many men will do it in 1 day ? In 8 days ? 24. If a boy runs 15J miles in 3J hours, how far does he run in an hour ?...