 | Clarence Wesley Sutton, Nels Johann Lennes - 1918 - 488 σελίδες
...All numbers which end in 5 or 0 are divisible by 5. All numbers which end in 0 are divisible by 10. A number is divisible by 3 if the sum of its digits is divisible by 3. Thus, 432423 is divisible by 3 because 4+3+2+4+2+3 = 18 is divisible by 3. A number... | |
 | Clarence Wesley Sutton, Nels Johann Lennes - 1918 - 320 σελίδες
...All numbers which end in 5 or 0 are divisible by 5. All numbers which end in 0 are divisible by 10. A number is divisible by 3 if the sum of its digits is divisible by 3. Thus, 432423 is divisible by 3 because 4+3+2+4+2+3 = 18 is divisible by 3. A number... | |
 | Webster Wells, Walter Wilson Hart - 1919 - 388 σελίδες
...it ends in zero or five. III. A number is divisible by 2 if it ends in zero or an even number. IV. A number is divisible by 3 if the sum of its digits is divisible by three. EXERCISE 23 1. What are the prime numbers between 1 and 100 ? Find the prime factors... | |
 | 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 3. Divisibility... | |
 | Charles Ernest Chadsey - 1920 - 328 σελίδες
...7500 19. 28550 6. 560 10. 1895 16. 3455 V20. 64301 J Summary — Tests for Divisibility ,-# 51 2. A number is divisible by 3 if the sum of its digits is divisible by 3. 3. A number is divisible by 4 if the number formed by the last two digits is divisible... | |
 | 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... | |
 | Eugene Henry Barker - 1920 - 264 σελίδες
...tests of divisibility are some of the most useful ones. 1. All even numbers are divisible by 2. 2. A number is divisible by 3 if the sum of its digits is divisible by 3. 3. A number is divisible by 4 if the number represented by the right-hand two digits... | |
 | 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... | |
 | 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.... | |
 | James Robert Overman - 1923 - 396 σελίδες
...even. 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 ;... | |
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A number is divisible by 3 if the sum of its digits is divisible by 3. 
