It's always nine because 3(3x+3) for numbers from 1-9 always yeilds a number that adds up to nine.
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If you ever need to know if an arbitrarily large number is a multiple of 3, just add up the digits in the number. If that sum is divisible by three, so is the larger number. If it isn't obvious, add up the sum again to get an even smaller number.
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Example: Is 661,337,929,457 divisible by 3? Well 6+6+1+3+3+8+9+2+9+4+5+7 is 63. 63 is a multiple of 3 so, yes. If you aren't sure about 63, then add 6+3 and see if the answer is divisible by 3. 6+3 is 9, so the answer, again, is yes to everything in this example being divisible by 3.
Comments
-.-
Wait
They all add up to stay at home don’t they lmmfao you bastards tricked me
BTW did you choose seven?
And I am half awake it is 4am here lol
12:00 here so yeah im supposed to be working
,
If you ever need to know if an arbitrarily large number is a multiple of 3, just add up the digits in the number. If that sum is divisible by three, so is the larger number. If it isn't obvious, add up the sum again to get an even smaller number.
,
Example: Is 661,337,929,457 divisible by 3? Well 6+6+1+3+3+8+9+2+9+4+5+7 is 63. 63 is a multiple of 3 so, yes. If you aren't sure about 63, then add 6+3 and see if the answer is divisible by 3. 6+3 is 9, so the answer, again, is yes to everything in this example being divisible by 3.