Five consecutive odd numbers have a total sum of 175. Identify the second-largest number, square the smallest number, and report the sum of these two results.

Difficulty: Easy

Correct Answer: none of the above

Explanation:


Introduction / Context:
This question combines sequences with arithmetic operations. Consecutive odd numbers centered on a middle term add up conveniently, enabling fast recovery of the five terms. Then we perform the requested operations to obtain the final sum.


Given Data / Assumptions:

  • Five consecutive odd integers sum to 175.
  • We need: (second-largest) + (smallest)^2.
  • Consecutive odd numbers are equally spaced with common difference 2.


Concept / Approach:
For five consecutive odds written as n−4, n−2, n, n+2, n+4, the sum is 5n. This determines the middle term immediately. Then list the set, pick out the smallest and second-largest, compute the square and the addition.


Step-by-Step Solution:
Let the five numbers be n−4, n−2, n, n+2, n+4.Sum = 5n = 175 → n = 35.Thus the numbers are 31, 33, 35, 37, 39.Smallest = 31; second-largest = 37.Compute 31^2 = 961; add 37 to get 961 + 37 = 998.


Verification / Alternative check:
Recheck the list and positions: second-largest is indeed 37 (only 39 is larger). The arithmetic 961 + 37 gives 998 consistently.


Why Other Options Are Wrong:
989, 997, and 979 are close distractors but do not match the exact computation. Since 998 is not listed among the main options, “none of the above” is correct.


Common Pitfalls:
Picking the largest instead of second-largest; squaring the wrong term; using even numbers or mis-centering the five odds.


Final Answer:
none of the above

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