 | Elmer Adelbert Lyman - 1905 - 268 σελίδες
...digits. Therefore, the number is divisible by 9 since 7 + 3 + 6 + 2 = 18 is divisible by 9. 6. Any number is divisible by 3 if the sum of its digits is divisible by 3. The proof, which is similar to the proof of Principle 5, is left for the student. 7. Any even number... | |
 | Jacob William Albert Young - 1905 - 264 σελίδες
...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, Lambert Lincoln Jackson - 1905 - 264 σελίδες
...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 - 266 σελίδες
...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... | |
 | David Eugene Smith - 1905 - 550 σελίδες
...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... | |
 | David Eugene Smith - 1905 - 646 σελίδες
...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... | |
 | James S. Sweet - 1907 - 268 σελίδες
...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... | |
 | Bruce Mervellon Watson, Charles Edward White - 1908 - 454 σελίδες
...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... | |
 | Thomas Jefferson McEvoy - 1908 - 472 σελίδες
...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... | |
 | William Francis Rocheleau - 1909 - 430 σελίδες
...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,... | |
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A number is divisible by 3 if the sum of its digits is divisible by 3• A number is divisible by 9 if the sum of its digits is divisible by 9. 
