 | George Wentworth, David Eugene Smith - Arithmetic - 1915 - 314 pages
...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... | |
 | George Wentworth, David Eugene Smith - Arithmetic - 1915 - 316 pages
...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... | |
 | Eva F. Buker - 1915 - 436 pages
...right-hand 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... | |
 | Samuel Hamilton - Arithmetic - 1917 - 312 pages
...m. 1%' M' A-4 number is divisible by 3 ?y ? Ae SMWÎ of its digits, or figures, is divisible by 3. A number is divisible by 9 if the sum of its digits is divisible by 9. 7. Memorize all the numbers to 63 that are divisible by 9; Ьу3. Change to lowest terms : abed ef... | |
 | Charles Ernest Chadsey, James Hamblin Smith - Arithmetic - 1917 - 328 pages
...3. 6. A number is divisible by 8 if the number formed by the last three digits is divisible by 8. 7. A number is divisible by 9 if the sum of its digits is divisible by 9. Exercise 9. "Buzz"—A Division Drill This game is played as follows: Form in a line. Count very rapidly... | |
 | Samuel Hamilton - Arithmetic - 1917 - 410 pages
...0. A number is divisible by 3 if the sum of its digits (that is, of the figures) is divisible by 3. A number is divisible by 9 if the sum of its digits is divisible *y9. Tell by inspection which of the following numbers are divisible by 2; by 5; by 3; by 9. 5. 6.... | |
 | Clarence Wesley Sutton, Nels Johann Lennes - Business mathematics - 1918 - 320 pages
...digits is divisible by 3. Thus, 432423 is divisible by 3 because 4+3+2+4+2+3 = 18 is divisible by 3. A number is divisible by 9 if the sum of its digits is divisible by 9. A number is divisible by 6 if it is even and is divisible by 3. Thus, 48732 is divisible by 6, while... | |
 | Clarence Wesley Sutton, Nels Johann Lennes - Business mathematics - 1918 - 488 pages
...digits is divisible by 3. Thus, 432423 is divisible by 3 because 4+3+2+4+2+3 = 18 is divisible by 3. A number is divisible by 9 if the sum of its digits is divisible by 9. A number is divisible by 6 if it is even and is divisible by 3. Thus, 48732 is divisible by 6, while... | |
 | John William Hopkins - Arithmetic - 1918 - 392 pages
...in 1336, by trial we find 336 contains 8, and so we know that 1336 contains 8. A number is exactly divisible by 9 if the sum of its digits is divisible by 9. A number is exactly divisible by 11 if the difference between the sum of its digits in the even places... | |
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A number is divisible by 9 if the sum of its digits is divisible by 9. 
