 | Jacob William Albert Young, Lambert Lincoln Jackson - Arithmetic - 1905 - 264 pages
...divisible by 3? In the same way test 49; 57; 63; 76; 81; 89; 96. Test for Divisibility by 3. An integer is divisible by 3 if the sum of its digits is divisible by 3, otherwise not. 3. Is 316 divisible by 4? Is the number represented by its last two digits [16] divisible... | |
 | Jacob William Albert Young - 1905 - 264 pages
...divisible by 3? In the same way test 49; 57; 63; 76; 81; 89; 96. Test for Divisibility by 3. An integer is divisible by 3 if the sum of its digits is divisible by 3, otherwise not. 3. Is 316 divisible by 4? Is the number represented by its last two digits [16] divisible... | |
 | David Eugene Smith - Arithmetic - 1905 - 646 pages
...2. 63. Divisibility by 5. A number is divisible by 5 if it en <Is in 0 or 5. 64. Divisibility by 3. A number is divisible by 3 if the sum of its digits is so divisible. For example, 411 is divisible by 3 because 4 + 1 + 1 is. WRITTEN EXERCISE 1. Which of... | |
 | David Eugene Smith - Arithmetic - 1905 - 316 pages
...by 2. 63. Divisibility by 5. A number is divisible by 5 if it ends in 0 or 5. 64. Divisibility by 3. A number is divisible by 3 if the sum of its digits is so divisible. For example, 411 is divisible by 3 because 4 + 1 + 1 is. WRITTEN EXERCISE 1. Which of... | |
 | Jacob William Albert Young - Arithmetic - 1905 - 266 pages
...divisibility are collected in the following table. A number is divisible : By 2, if it ends in 0, 2, 4, 6, 8. By 3, if the sum of its digits is divisible by 3. By 4, if the number represented by the two digits at the right is divisible by 4. By 5, if it ends... | |
 | James S. Sweet - Business mathematics - 1907 - 268 pages
...dividend and divisor. 123. Divisibility of Numbers : 1 . All even numbers are divisible by 2 . 2. Any number is divisible by 3 if the sum of its digits is divisible by 3. 3. By 4 if the two right hand digits express a number that is divisible by 4. 4. By 5 if the number... | |
 | Thomas Jefferson McEvoy - Education - 1908 - 472 pages
...or clearer. 400. Tests of divisibility.—A number is divisible : By 2, if it ends in 0, 2, 4, 6, 8. By 3, if the sum of its digits is divisible by 3. By 4, if the number represented by the two digits at the right is divisible by four. By 5, if it ends... | |
 | Bruce Mervellon Watson, Charles Edward White - Arithmetic - 1908 - 454 pages
...number expressed by them is divisible by 8; eg 11,000 and 37,112. How do you know? Why not 76,518? d. By 3, if the sum of its digits is divisible by 3; eg 24,762, since 2 + 4 + 7 + 6 + 2, or 21, is divisible by 3. e. By 9, if the sum of its digits is... | |
 | William Francis Rocheleau - Correspondence schools and courses - 1909 - 430 pages
...rules are: (1) Any number is divisible by 2 if its last digit is 2 or another even number. (2) Any number is divisible by 3 if the sum of its digits is divisible by 3. (3) Any number is divisible by 5 if its last digit is o or 5. It may not be worth while to learn others,... | |
 | Jacob William Albert Young, Lambert Lincoln Jackson - Arithmetic - 1909 - 282 pages
...a number divisible by 4. Thus, 1,524 is divisible by 4, because 24 is divisible by 4. 3. An integer is divisible by 3 if the sum of its digits is divisible by 3. Thus, 24,120 is divisible by 3, because 2 + 4+1+2+0-9 is divisible by 3. 4. An integer is divisible... | |
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A number is divisible by 3 if the sum of its digits is divisible by 3. 
