 | Bruce Mervellon Watson, Charles Edward White - 1911 - 424 σελίδες
...of its digits is divisible by 3 ; eg 24,762, since 2 + 4 -f 7 + 6 + 2, or 21, is divisible by 3. e. By 9, if the sum of its digits is divisible by 9 ; eg 397,647, since 3 + 9 + 7 + 6 + 4 + 7, or 36, is divisible by 9. /. By 5, if the units' digit is... | |
 | James Charles Byrnes, Julia Richman, John Storm Roberts - 1911 - 260 σελίδες
...divisible by 2 and 3. By 8, if the number represented by the three digits at the right is divisible by 8. By 9, if the sum of its digits is divisible by 9. By 10, if it ends in 0. By 12, if it is divisible by 3 and by 4. EXERCISE 18. Factor: i. 25, 32, 48,... | |
 | Alva Walker Stamper - 1913 - 296 σελίδες
...number ending with a 5 is divisible by 5. 4. A number ending with a 0 is divisible by both 5 and 10. 5. A number is divisible by 9 if the sum of its digits is divisible by 9. For instance, 3465 is divisible by 9 since the sum of its digits, 18, is divisible by 9. The proof... | |
 | Alva Walker Stamper - 1913 - 302 σελίδες
...number ending with a 5 is divisible by 5. 4. A number ending with ao is divisible by both 5 and 10. 5. A number is divisible by 9 if the sum of its digits is 6. A number is divisible by 3 if the sum of its digits is divisible by 3. QUESTIONS The following are... | |
 | George Morris Philips, Robert Franklin Anderson - 1913 - 444 σελίδες
...righthand digits is divisible by 4. by 5, if it ends in 0 or 5. by 6, if it is divisible by 2 and by 3. by 9, if the sum of its digits is divisible by 9. by 12, if it is divisible by 3 and by 4. by 15, if it is divisible by 3 and by 5. by 25, if it ends... | |
 | John Charles Stone, James Franklin Millis - 1914 - 354 σελίδες
...5 if it ends in 5 or 0IV. A number is divisible by 3 if the sum of its digits is divisible by 3. V. A number is divisible by 9 if the sum of its digits is divisible by 9. Cancellation 1. If a farmer raises 1050 bu. of corn on a 15-A. field, how many bushels should he raise... | |
 | George Albert Wentworth, David Eugene Smith - 1914 - 378 σελίδες
...number is divisible by 8 if the number represented by its three right-hand figures is so divisible. A number is divisible by 9 if the sum of its digits is so divisible. A number is divisible by 11 if the difference between the sums of the digits in its even... | |
 | William James Milne - 1914 - 364 σελίδες
...3. ' Thus, 321 is divisible by 3 because the sum of its digits 3+2 + 1=6, and 6 is divisible by 3. By 9, if the sum of its digits is divisible by 9. Thus, 927 is divisible by 9 because the sum of its digits 9 + 2 + 7 = 18, and 18 is divisible by 9.... | |
 | George Wentworth, David Eugene Smith - 1915 - 316 σελίδες
...number is divisible by 8 if the number represented by its three right-hand figures is so divisible. A number is divisible by 9 if the sum of its digits is so divisible. A number is divisible by 11 if the difference between the sums of the digits in its even... | |
 | George Wentworth, David Eugene Smith - 1915 - 314 σελίδες
...number is divisible by 8 if the number represented by its three right-hand fiffures is so divisible. A number is divisible by 9 if the sum of its digits is so divisible. A number is divisible by 11 if the difference between the sums of the digits in its even... | |
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A number is divisible by 9 if the sum of its digits is divisible by 9. 
