Question
If the 9 digit number 89x64287y is divisible by 72, then
what is the value of (3x+2y)?Solution
89x64287y 87y is divisible by 8 So, y = 2 Now, 8 + 9 + x + 6 + 4 + 2 + 8 + 7 + 2 = 46 + x x = 8 So, 3x + 2y = 3 × 8 + 2 × 2 = 24 + 4 = 28 ∴ The value of (3x + 2y) is 28
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