Divisibility Rules. Page 10 in textbook. What does it mean to be divisible?. Divisible A whole number is divisible by another number if the remainder is 0 when the first number is divided by the second. Rule. A whole number is divisible by 2 : if the ones digit is divisible by 2
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Page 10 in textbook
A whole number is divisible by another number if the remainder is 0 when the first number is divided by the second.
8 + 0 = 8 Not divisible by 3!
look at the last 2 digits: 05 NOT divisible by 4!
look at the ones place: 5 YES it is divisible by 5!
Check for 2: ends in 6 which is divisible by 2
Check for 3: 1 + 2 + 6 = 9 which is divisible by 3
So, YES it is divisible by 6 because it is divisible by both 2 AND 3!
6 + 0 = 6, So NO it is not divisible by 9
Look at the ones place 6, so NO!