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 Question from BJ, a parent: My son got this math problem which he could mostly solve. Here it is: The highest location in a certain country is 4525 m above sea level. The lowest point in the same country is 192 m below sea level. a) Find the difference of the two elevations. His answer: a-(-b)= a+b or 4525-(-192)= 4525+192=4717 m. No problem. b) A city is 2221 m above sea level. Is this elevation closer to the highest point or the lowest point? His answer: highest point because: 4525-2221= 2304 m (closest to the highest point) and 2221-(-192)=2221+192= 2413 m. (farthest to the lowest point). OK so far. But then he was given 4 choices for this question with no other information: a) 4717 m; lowest b) 4333 m; lowest c) 4333 m; highest d) 4717 m; highest What does it mean? What's the connection with the rest of the problem? Thanks for helping us.

Hi,

This problem is being presented as a multiple choice problem. Your son is being given 4 choices for an answer. They are.

1. The answer to a) is 4717m and the answer to b) is lowest.

2. The answer to a) is 4333m and the answer to b) is lowest.

3. The answer to a) is 4333m and the answer to b) is highest.

4. The answer to a) is 4717m and the answer to b) is highest.

The correct answer is the fourth choice as your son determined. What I found confusing was that the two parts of the question were labeled a) and b) and the first two choices were also labeled a) and b).

I hope this helps,
Harley

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