 | John Charles Stone, James Franklin Millis - 1920 - 344 σελίδες
...two right-hand figures is divisible by 4. III. A number is divisible by 5 if it ends in 5 or 0. IV. A number is divisible by 3 if the sum of its digits is divisible by 3. V. A number is divisible by 9 if the sum of its digits is divisible by 9. Cancellation 1. If a farmer... | |
 | Eugene Herz, Mary G. Brants - 1920 - 304 σελίδες
...digits are divisible by 4A number is divisible by 8 if its last three digits are divisible by 8. , A number is divisible by 3 if the sum of its digits is divisible by 8. A number is divisible by 6 if it is an even number and the sum of its digits is divisible by 3.... | |
 | George Albert Wentworth, David Eugene Smith - 1920 - 332 σελίδες
...54 we see that 4 is divisible by 2, and so we know that 54 is divisible by 2. Divisibility by 3. A number is divisible by 3 if the sum of its digits is so divisible. For example, since 4+1 + 1, or 6, is divisible by 3, we see that 411 is divisible by... | |
 | Edson Homer Taylor - 1922 - 180 σελίδες
...A number is divisible by 8 if the number represented by the last three digits is divisible by 8. 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. Exercise 7 1. The number of... | |
 | Helen J. Kiggen - 1922 - 424 σελίδες
...Tests of divisibility. A number is divisible: JBy 2, if it ends in 0, 2, 4, 6, 8, or when it is even. By 3, if the sum of its digits is divisible by 3. By 4, if the number expressed by its two right hand digits, is divisible by 4. By 5, if it ends in... | |
 | James Robert Overman - 1923 - 396 σελίδες
...Test for 2. Any number is divisible by 2 if the right hand digit is divisible by 2. Test for 3. Any number is divisible by 3 if the sum of its digits is divisible .by 3. Thus 258 is divisible by 3 because the sum of its digits, 15, is divisible by 3 ; but 347 is not divisible... | |
 | Robert Lee Morton - 1927 - 374 σελίδες
...would seem to be little advantage in learning rules for divisibility. Many recommend the rule that a number is divisible by 3 if the sum of its digits is divisible by 3 but in the fractions that people ordinarily handle, there are very few with which this rule can be... | |
 | 1928 - 1958 σελίδες
...An even number is divisible by 2. 2. A number whose unit's figure is 0 or 5 is divisible by 5. 3. A number is divisible by 3 if the sum of its digits is divisible by three. 4. A number is divisible by 9 if the sum of its digits is divisible by 9. Other tests are often... | |
 | Raymond Asa Kent, Martha C. Olsen, James R. Skiles - 1927 - 462 σελίδες
...a remainder. A number is divisible: 1. By 2 if its unit figure is divisible by 2. As 16 or 126. 3. By 3 if the sum of its digits is divisible by 3. As 171 or 354. 4. By 9 if the sum of its digits is divisible by 9. As 711 or 6381. 6. By 6 if it is... | |
 | Jack Frohlichstein - 1967 - 340 σελίδες
...the numerator and denominator of TT= are zo divisible by 2 because 2 and 6 are even numbers. (c) Any number is divisible by 3 if the sum of its digits is 24 3 divisible by 3. Example: ^ is divisible by - because 24 = 2 JvJ .J + 4 = 6 and 36 = 3 + 6 = 9,... | |
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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. 
