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Practice mode Problems on Numbers

The product of the digits of a two-digit number is 24. When 45 is added to the number, its digits are reversed. What is the number?

Correct answer D. 38

Explanation

9(b - a) = 45 gives b = a + 5, and a x b = 24 gives a = 3, b = 8. The number is 38.

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