 | William Estabrook Chancellor - 1902 - 264 σελίδες
...divisible by 2. Then 12, 16, 18, 152, 374, are divisible by 2, because 6, 8, 2, and 4 can be divided by 2. Any number is divisible by 3 if the sum of its digits, or figures, is divisible by 3. 474 can be divided by 3, for its digits, added together, make a sum,... | |
 | John Williston Cook, Nebraska C. Cropsey - 1903 - 408 σελίδες
...OF DIVISIBILITY. 83. Any number is divisible by 2 if its right-hand figure is 2, 4, 6, 8, or 0. 84. Any number is divisible by 3 if the sum of its digits is divisible by 3. 263,457 is divisible by 3 because the sum of 2, 6, 3, 4, 5, and 7 is divisible by 3.... | |
 | Oscar Lynn Kelso - 1903 - 308 σελίδες
...10's plus the number represented by the right-hand figure. 10 is divisible bv 2. Draw the conclusion. Any number is divisible by 3 if the sum of its digits is divisible by 3. Thus, 477 is divisible by 3, since 4+ 7 + 7 = 18, which is divisible by 3. PROOF. In... | |
 | 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 these are divisible... | |
 | 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 these are divisible... | |
 | Elmer Adelbert Lyman - 1905 - 270 σελίδες
...the 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.... | |
 | William Estabrook Chancellor - 1906 - 164 σελίδες
...divisible by 2. Then 12, -16, 18, 152, 374, are divisible by 2, because 6, 8, 2, and 4 can be divided by 2. Any number is divisible by 3 if the sum of its digits, or figures, is divisible by 3. 474 can be divided by 3, for its digits, added together, make a sum,... | |
 | James S. Sweet - 1907 - 268 σελίδες
...both 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... | |
 | William Francis Rocheleau - 1909 - 430 σελίδες
...These 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... | |
 | Charles H. Gleason - 1910 - 536 σελίδες
...Which of the following numbers are divisible by 2 : 246, 347, 890, 2,743, 27,692, 98,310, 93,762? A number is divisible by 3, if the sum of its digits is divisible by 3. 2. Which of the following numbers are divisible by 3 : 250, 251, 365, 368, 1,011, 258,... | |
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A number is divisible by 3 if the sum of its digits is divisible by 3. 
