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Which of the numbers is divisble by 3 199 209 390 or 499?

Updated: 8/20/2019
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11y ago

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Here's a mathematical trick. Any number wholly divisible by 3 has the sum of its digits equal to 3 or a multiple of 3.

199 : 1 + 9 + 9 = 19....NOT divisible by 3

209 : 2 + 0 + 9 = 11....NOT divisible by 3

390 : 3 + 9 + 0 = 12....YES, this is divisible by 3

499 : 4 + 9 + 9 = 22....NOT divisible by 3

Note : 390 ÷ 3 = 130

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Q: Which of the numbers is divisble by 3 199 209 390 or 499?
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