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To determine if a number is divisible by 3, you can add up the digits of the number and check if the sum is divisible by 3. For 313, the sum of the digits is 3+1+3=7, which is not divisible by 3. For 351, the sum of the digits is 3+5+1=9, which is divisible by 3. Therefore, 351 is divisible by 3, but 313 is not.
The absolute value can be thought as the distance from 0. In other words, if you started at zero and counted to that number what number would you be on when you got there. So -351 is 351 spaces away from 0. The absolute value of -351 or |-351| is 351. Pretty easy.
6788 - 351 = 6437
351 = CCCLI
The factors of 351 are: 1, 3, 9, 13, 27, 39, 117, and 351.The prime factors of 351 are: 3 and 13.