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Let the number be 10x + y, where x and y are its digits. From the problem, x + y = 10 and 10x + y + 36 = 10y + x. Simplifying the second equation: 9x - 9y = -36 → x - y = -4. Solving x + y = 10 and x - y = -4, we get x = 3 and y = 7. The number is 10x + y = 37. Correct Option: b
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