Divisibilty Rules for Division by 7
Here's how to tell if a given number is divisible by 7:
Take the last digit, double it, then subtract this value from the number represented by the other digits in the number (less the last one). If the result is 0 or a number that is divisible by 7, then the number itself is divisible by 7.
For example 735 => 73 - (2*5) = 63. Since 63 is divisible by 7, 735 is then divisible by 7.
Take the last digit, double it, then subtract this value from the number represented by the other digits in the number (less the last one). If the result is 0 or a number that is divisible by 7, then the number itself is divisible by 7.
For example 735 => 73 - (2*5) = 63. Since 63 is divisible by 7, 735 is then divisible by 7.
| Rating: | 100% positive, 2 total Votes |
| Categories: | math division numbers |
| Added: | on Mar 27, 2007 at 8:21 am |
| Added By: | connerj |
