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" By 3, if the sum of the digits is divisible by 3. By 4, if its tens and units are together divisible by 4. By 5, if the units figure is 5 or 0. "
A Secondary Arithmetic - Page 40
by John Charles Stone - 1908
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Connections Maths, Volume 9

Ajit Kalra, James Stamell - Juvenile Nonfiction - 2004 - 616 pages
...number formed will: be even? be odd? start with 7? end in 8? be greater than 5000? be less than 8000? A number is divisible by 3 if the sum of the digits is divisible by 3, be exactly divisible by 3? In a recent survey of a suburb it was found that 25% of households had no...
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Connections Maths, Volume 9

Ajit Kalra, James Stamell - Juvenile Nonfiction - 2004 - 458 pages
...they equally likely? Explain. с What is the chance that when I arrive at the lights they will be red? A number is divisible by 3 if the sum of the digits is divisible by 3. 15 A 4-digit number is made using the digits 5, 6, 7 and 8. What is the probability that the number...
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Crossing the River with Dogs: Problem Solving for College Students

Ken Johnson, Ted Herr, Judy Kysh - Mathematics - 2003 - 506 pages
...Examples: 12 and 624 are divisible by 2. The numbers 43 and 579 are not divisible by 2. Divisibility by 3: A number is divisible by 3 if the sum of the digits is divisible by 3. Examples: 57,624 is divisible by 3 because the sum 468 of the digits 5 + 7 + 6 + 2 + 4 = 24, which...
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Can Do Problem Solving Year 5 Teacher's Book

Sarah Foster, Lynsey Ankers - Mathematics - 2004 - 148 pages
...four of these numbers are exactly divisible by 4? 142 254 436 64 86 528 916 c) A number is exactly divisible by 3 if the sum of the digits is divisible by 3. Which three of these numbers are exactly divisible by 3? 78 145 203 141 83 246 133 d) All these numbers...
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Creative Teaching in Mathematics: Charles University in Prague, Czech ...

2006 - 320 pages
...(iii) above but the sum of the digits of all the numbers the marked 'diagonals' is a multiple of 3. A number is divisible by 3 if the sum of the digits is 3 or a multiple of 3. Task PI 0 The pupils should draw the graph of the 6 times table using only the...
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