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A two-digit number is such that the product of the digits is 8. When 18 is added to the number, then the digits are reversed. The number is :_________?

Correct answer: B. 24

  • A. 18
  • B. 24
  • C. 42
  • D. 81

Explanation

The digit product 8 allows the two-digit arrangements 24 and 42. Testing the reversal condition, 24 + 18 = 42, so 24 is the required number, whereas 42 + 18 is not 24. The likely wrong choice is 42, which has the correct digits but fails the stated addition condition.

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