Three consecutive odd integers are in increasing order such that the sum of the last two integers is 13 more than the first integer. Find the three integers?
Correct answer: D. 7, 9, 11
- A. 9, 11, 13
- B. 11, 13, 15
- C. 13, 15, 17
- D. 7, 9, 11
- E. None of these
Explanation
Let the three consecutive odd integers be x, x + 2 and x + 4. Their condition gives (x + 2) + (x + 4) = x + 13, so x = 7 and the integers are 7, 9 and 11. A likely choice is option a, 9, 11, 13, from overlooking that the first integer must be included separately in the comparison.
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