Is 643 divisible by 3? In other words, if you divide 643 by 3, will you get a whole number with no remainder?
Of course, you could use a calculator to find out if 643 is divisible by 3, but what fun would that be?
To find out if 643 is divisible by 3, we will add up the numbers that make 643 as follows: 6 + 4 + 3 = 13
We know that if the sum of the numbers that make up 643 is divisible by 3, then 643 is divisible by 3.
Since the sum of the digits in 643 is not divisible by 3, 643 is also NOT divisible by 3. Thus, the answer to the question "Is 643 divisible by 3?" is as follows:
No
Note: If you divide 643 by 3, you get 214.33 which is not a whole number.
Divisible by 3?
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