 | John Bonnycastle - 1851 - 314 pages
...divisible by 8 ; and in general it is divisible by 2", if the last re digits are divisible by 2". 6. A number is divisible by 3, if the sum of the digits is divisible by 3; such number also may be divided by 6, if, besides this, the last digit is even; it is divisible by... | |
 | William Templeton (engineer.) - 1852 - 284 pages
...divisible by 8 ; and in general it is divisible by 2", if the last n digits are divisible by 2». 6. A number is divisible by 3 if the sum of the digits is divisible by 3 ; sucli number also may be divided by 6 if, besides this, the last digit is even ; it is also divisible... | |
 | George Washington Hull - Arithmetic - 1895 - 408 pages
...factoring numbers: A number is exactly divisible — By 2 if its right-hand figure is 2, 4, 6, 8, or 0. By 3 if the sum of the digits is divisible by 3. By 4 if the number formed by its last two digits is divisible by 4. By 5 if its right-hand figure is... | |
 | Wilbur Fisk Nichols - Arithmetic - 1898 - 152 pages
...prime factors of 15? 12. A number is exactly divisible : By 2, if its units figure is divisible by 2. By 3, if the sum of the digits is divisible by 3. By 4, if its tens and units are together divisible by 4. By 5, if the units figure is 5 or 0. By 6,... | |
 | Wilbur Fisk Nichols - Arithmetic - 1899 - 174 pages
...prime factors of 15? 12. A numlier is exactly divisible : By 2, if its units figure is divisible by 2. By 3, if the sum of the digits is divisible by 3. By 4, if its tens and units are together divisible by 4. By 5, if the units figure is 5 or 0. By 6,... | |
 | Wilbur Fisk Nichols - Arithmetic - 1903 - 296 pages
...prime factors of 15? 12. A number is exactly divisible : By 2, if its units figure is divisible by 2. By 3, if the sum of the digits is divisible by 3. By 4, if its tens and units are together divisible by 4. By 5, if the units figure is 5 or 0. By 6,... | |
 | Samuel Hamilton - Arithmetic - 1909 - 294 pages
...these numbers divisible by 3? Divide by 3, other numbers the sum of whose digits is divisible by 3. A number is divisible by 3, if the sum of the digits is divisible by 3. 4. Divide 9, 18, 36, 81, 189, and 918 each by 9. Is the sum of the digits in each of these numbers... | |
 | Wilbur Fisk Nichols - 1910 - 236 pages
...number is divisible (can be exactly divided) a. By 2, if the units' figure is 0 or is divisible by 2. b. By 3, if the sum of the digits is divisible by 3. c. By 5, if the units' figure is 0, or is divisible by 5. 11. Applying these tests name the numbers... | |
 | George Albert Wentworth, David Eugene Smith - Arithmetic - 1912 - 374 pages
...being 2x5. Thus we may tell without dividing that 1,023,578 is divisible by 2. 168. Divisibility by 3. A number 'is divisible by 3 if the sum of the digits is divisible by 3. We often use the word digits to mean the value of the symbols 0, 1, 2, and so on to 9, as well as the... | |
 | William James Milne - Arithmetic - 1914 - 364 pages
...is divisible : By 2, if the units' figure is 2, 4, 6, 8, or 0. By 5, if the units' figure is 5 or 0. By 3, if the sum of the digits is divisible by 3. ' Thus, 321 is divisible by 3 because the sum of its digits 3+2 + 1=6, and 6 is divisible by 3. By... | |
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By 3, if the sum of the digits is divisible by 3. By 4, if its tens and units are together divisible by 4. By 5, if the units figure is 5 or 0. 
