325. The Names of the Months, and the number of

The exact length of the year is about 365 days; hence, every fourth year February has 29 days, and the year has 366 days. In general, every year whose number can be divided by 4 without a remainder is leap year.

Thus, the year 1872 is a leap year.

326.-1. How many seconds in 1 minute? In one half a minute? In one third of a minute?

2. How many minutes in 120 seconds?

3. How many minutes in 1 hour? In of an hour? 4. How many hours in 120 minutes? In 180

minutes? In 240 minutes?

5. How many hours in 2 days? In 3 days?
6. What part of a day is 6 hours?
7. How many days in 48 hours?

day are 6 hours?

Is 18 hours?
What part of a

8. How many months in 5 years? In 9 years? 9. How many weeks in 49 days? In 63 days? 10. How many days has a leap year? A common year?

11. What months have 30 days each? In what years does February have 29 days?

12. How many days are there in 7 weeks? In 9 weeks?

13 米

WRITTEN EXERCISES.

327.-1. How many minutes in 18 days?
2. How many days in 25920 minutes?
3. How many hours in a common year?
4. How many seconds in 24 hours?
5. How many hours in 86400 seconds?
6. How many years in 8760 hours?

7. How many seconds in a common year?
8. How many days in 31622400 seconds?

9. If you are 11 years old, how many minutes have you lived, allowing 365 days to a year?

66

12 gross

1 great gross. . grt. gro.

Two things are a pair, and 20 things are a score.

330.—1. How many sheets of paper in 2 quires? 2. How many quires in 1 bundle? In 2 bundles? 3. How many quires in 48 sheets?

4. How many reams in 80 sheets? 5. How many things in 5 dozen?

in a gross?

In 100 sheets?
How many pens

6. How many dozen in a great gross? In half of a great gross?

7. How many pairs are 40? How many scores are 40? Are 80? Are 120 ?

WRITTEN EXERCISES.

331.—1. How many sheets are 91⁄2reams? 2. How many reams are 4560 sheets?

3. How much will a gross of pens cost, at 16 cents a dozen?

4. If you buy 5% reams of paper, how many sheets will you obtain?

5. In some boxes there are 2064 eggs; what is their value at 30 cents a dozen?

6. How many boxes will be required to pack 2592 screws, if each box will hold 9 dozen?

7. How much will 25 gross of pens cost, at 2 cents per pen?

8. What will 75 bundles of paper cost, at 15 cents per quire?

332. TEST QUESTIONS.-1. What is a circle? A circumfer ence? An arc? A degree?

2. What is an angle? The measure of an angle?

3. What are circular measures? The units of circular measures? Recite the table.

4. How many miles is a minute of circumference?

5. What are measures of time?

time? Recite the table.

The units of measures of

6. How many days are 1 week? How many months are 1 year? How many years are 1 century?

7. Name the months, and give the number of days in each.

8. What is the exact length of a year? How often has February 29 days? When February has 29 days, how many days has the year? In general, what years are leap years?

9. By what is paper bought and sold? Recite the table. What units are used in counting certain articles? Recite the table. How many things are a pair? How many things are a score?

SECTION XXIX..

REVIEW OF DENOMINATE NUMBERS.

333.-1. How many inches in of a yard?

SOLUTION.-1 yard is 3 feet; of 3 feet are 2 feet; and since 1 foot is 12 inches, 2 feet are 2 times 12 inches, or 24 inches. Hence, of a yard are 24 inches.

2. How many pints in of a bushel?

3. At & of a dollar a cord foot, what will of a cord of wood cost?

4. At $.10 per ounce, what will 11⁄2 pounds of spice cost?

5. What part of a bushel is 3 pecks?

6. At 2 dollars a bushel, what will 3 pecks of wheat cost?

7. James is 108 months old, and his age is of his brother's. What is his brother's age?

8. At 16 cents a yard, what will 9 yards of cloth cost?

9. At 12 cents a peck, how many bushels of oats can be bought for 96 cents?

10. If 40 perches of land cost 9 dollars, what will an acre cost?

11. If of a ton of hay be worth 3 dollars, what will 30 hundred-weight be worth?

WRITTEN EXERCISES.

334.-1. How many minutes in a leap year?

2. A walk is 40 rods Jong; what will it cost to pave it, at 25 cents per linear foot?

3. Into how many lots, of 20 square rods each, can an acre and a half be divided?

4. How much must be paid for 25 barrels of beef, at 11 cents a pound?

5. At 11 cents a pound, how many pounds of beef can be bought for $550?

6. For how much will a hogshead of liquor sell, if retailed at 10 cents a half gill?

7. A certain town is 36 square miles in extent; how many acres does it contain?

8. How many bushels in a load of corn, which, at 86 cents a bushel, costs $34.40?

9. How many hogsheads of molasses, of 63 gallons each, worth 55 cents a gallon, can be bought for $1386 ?