 | 1836 - 366 σελίδες
...metre which is one ten-millionth part of a fourth of its circumference. 237. A number is divisible by 9, if the sum of its digits is divisible by 9 ; and by 1 1, if the sum of the 1st, 3rd, 5th .... digits is equal to the sum of the 2nd, 4th, 6th,... | |
 | James Stewart Eaton - 1857 - 376 σελίδες
...-f- 4 -f- 3 is the sum of the digits which express the number 5G43 ; hence any number is divisible by 9 if the sum of its digits is divisible by 9. • If the sum of the digits of a number divided by 9 give a remainder, then the number itself divided... | |
 | Horatio Nelson Robinson - 1860 - 444 σελίδες
...sum, or the entire number, is divisible_by the same power of 5, (135, II). IX. A number is divisible by 9 if the sum of its digits is divisible by 9. For, if any number, as 7245, be separated into its parts, 7000 + 200 + 40+5, and each part be divided... | |
 | George Augustus Walton - 1864 - 376 σελίδες
...number. Thi> following principles are derived directly from Art 511 : — «512. Any number is divisible by 9, if the sum of its digits is divisible by 9. •5 1 Íí . If any number is divided by 9, the remainder is equal to the remainder when the sum of... | |
 | George Augustus Walton - 1864 - 364 σελίδες
...number. The following principles are derived directly from Art. 511 : — 513. Any number is divisible by 9, if the sum of its digits is divisible by 9. •113. If any number is divided by 9, the remainder is equal to the remainder when the sum of its... | |
 | Samuel H. Winter - 1864 - 348 σελίδες
...shot in the bottom course. 11. Solve the equations i.ax ~,„ ~ 12. Prove that a number is divisible by 9, if the sum of its digits is divisible by 9. 13. Find the present value of £1 due 12 years hence, money bearing 4£ per cent. compound interest.... | |
 | Howard Candler - 1868 - 132 σελίδες
...further object in view of explaining the principle of the " chain rule." NOTE D. A number is divisible by 9, if the sum of its digits is divisible by 9. Take the numbers 45678. 45678 = 40000 4- 5000 + 600 + 70 + 8 = 4 (9999 + i) + 5 (999 + i) + 6 (99 +... | |
 | Adolf Sonnenschein - 1873 - 194 σελίδες
...divisible by 9. Note that 27 = the sum of the digits in 153576. Learn by heart : A number is divisible by 9 if the sum of its digits* is divisible by 9. (/) Eeasoning analogous to that just given shews that any number is an exact number of nines + the... | |
 | Daniel W. Fish - 1874 - 542 σελίδες
...are ciphers, or express a number divisible by 8. Thus, 3000, 2728, and 10576 are divisible by 8. 7. By 9, if the sum of its digits is divisible by 9. Thus, 217683 and 401301 are divisible by 9. 8. By 10, if it ends with one or more ciphers. Thus, 40,... | |
 | Horatio Nelson Robinson - 1875 - 468 σελίδες
...sum, or the entire number, is divisible by the same power of 5, (135, II). IX. A number is divisible by 9 if the sum of its digits is divisible by 9. For, if any number, as 7245, be separated into its parts, 7000 + 200 +40+5, and each part be divided... | |
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An integer is divisible by 3 if the sum of its digits is divisible by 3. An integer is divisible by 9 if the sum of its digits is divisible by 9. 
