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Earn +20 ptsQ: How do you tell if a number is divisible by 3?
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How do you tell if a number is divisible by six?
If it's even and divisible by 3, it's divisible by 6.
Which divisibility rule would you apply to tell whether a number is divisible by 3?
If the sum of the digits is a multiple of 3, the whole number is divisible by 3.
Is 2131 divisible by 3?
Not evenly. An easy way to tell is that its digits add up to 7, a number which is not divisible by 3.
How can you tell whether a number is divisible by 3?
If the sum of its' digits are divisible by 3 for all numbers greater than 9.
Why is 129 divisible by 3?
You can tell a number is divisible by 3 when the sum of its digits is equal to 3 or a multiple of three. In this instance, 1 + 2 + 9 = 12/3 = 4, therefore 129 is divisible by 3.
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