The civil service arithmetic. [With] A key


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Δημοφιλή αποσπάσματα

Σελίδα 75 - To reduce a mixed number to an improper fraction. RULE. — Multiply the whole number by the denominator of the fraction...
Σελίδα 135 - In any proportion, the product of the means is equal to the product of the extremes.
Σελίδα 15 - It shows that the numbers between which it is placed, are to be multiplied together. Thus the expression 9x6, signifies that 9 and 6 are to be multiplied together, and is read, " 9 multiplied by 6," or, simply,
Σελίδα 195 - A Bill of Exchange is a written order for the payment of a certain sum of money, at an appointed time.
Σελίδα 217 - ... What fractions of a straight angle ? How many degrees in each angle ? State in each case whether the angle is acute, right, or obtuse. 13. How many degrees in the angles formed by the hands of a clock when the time is 3.12, 11.48, 10.48, 8.24, 9.36, 6.20, 7.22 (railroad notation) ? (Remember that the minute hand travels 12 times as fast as the hour hand, and that a minute division on the face of the clock represents 6°.) 14. In how many minutes does the minute hand revolve through an angle of...
Σελίδα 250 - As the area of a circle is proportional to the square of its diameter, it follows that the resistances of round conductors are inversely proportional to the squares of their diameters.
Σελίδα 237 - If 5 men can perform a piece of work in 12 days of 10 hours each, how many men will perform a piece of work four times as large in a fifth part of the time, if they work the same number of hours in the day, supposing that 2 of the second set can do as much work in an hour as 3 of the first set?
Σελίδα 20 - The number to be divided is called the dividend. The number by which we divide is called the divisor.
Σελίδα 268 - If a piece of work can be finished in 45 days by 35 men, and if the men drop off by 7 at a time at the end of every 15 days, how long will it be before the work is finished ? 14.
Σελίδα 204 - ... 7 men working 16 days can mow a field of corn 1320 yards long and 880 wide ; what will be the length of the side of a field 1320 yards broad which 4 men can mow in 42 days ? 34.

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