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Let the number be x and y and for two digits = 10x + y so, ATQ => (10x + y) – (10y – x) = 18 => 9x – 9y = 18 => x – y = 2 unit digit of 226 = 4 so, y = 4 x – y = 2 so, x = 6 Therefore, product of x and y = 4 × 6 = 24
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