SOLUTION: When the two-digit number 5n is rounded to the nearest tens, it is equal 50. What is the largest value of n?

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Question 1151277: When the two-digit number 5n is rounded to the nearest tens, it is equal 50. What is the largest value of n?
Answer by ikleyn(52781)   (Show Source):
You can put this solution on YOUR website!
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According to the condition, 5n is integer number multiple of 5. 50 rounded to the nearest tens is 50. 55 rounded to the nearest tens is 60. Therefore, the ANSWER to the problem's question is n= 10.

            Notice that in my solution above I assumed that "n" is integer.
            Another solution is possible, if this assumption is not valid.

Then 5n is two-digit number NOT NECESSARY multiple of 5. To be rounded to 50, it must be <= 54. Then the largest "n" is n = = 10.8.