Find the value of P if '7654P321' is divisible by 3.
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The sum of digits of a number divisible by 3 is a multiple of 3 3 + 5 + a + 6 + 4 = 3n 18 + a = 3n If n = 6 18 + a = 18 a = 0 If n = 7, 18 + a = 21 a = ... More
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