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In most cases, it is easier to do the division than to use some special divisibility rule. Divisibility rules only save you time in some special cases, such as:
- 2, 4, 8, 5, 10, 25 (look at the last digit or digits)
- 3, 9 (add the digits, and see if it is divisible by 3 or by 9, respectively)
- 7, 11, and 13 (separate the last three digits and subtract from the remaining number)
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Earn +20 ptsQ: What is divisiblity rule for numbers 2to20?
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Divisiblity rule for 119?
Just carry out the division, and see if you get an integer. It isn't worth the trouble to memorize or, worse, figure out divisibility rules for all sorts of large numbers.
What is the divisiblity rule of 9?
The rule to decide if a number is divisible by 9 is to look at the sum of the digits. If the sum of the digits is divisible by 9, then so is the number.
What is the divisiblity rule for the number 8?
To find out if a number is divisible by 8 the number must be divisible by 2 and 4!
What are the divisiblity rules for 1 - 10?
-9
What is the smallest number that is divisiblity by 2.3.4.5.6?
60.
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