What is the value of the tenths digit of number x?
(1) The hundredths digit of x is 5
(2) Number x, rounded to the nearest tenth, is 54.5
OA C
Source: GMAT Prep
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What is the value of the tenths digit of number x?
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BTGmoderatorDC
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Jay@ManhattanReview
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Say the number x = ab.cd, where c = tenths digit and d = hundreths digitBTGmoderatorDC wrote: ↑Wed Feb 12, 2020 6:31 pmWhat is the value of the tenths digit of number x?
(1) The hundredths digit of x is 5
(2) Number x, rounded to the nearest tenth, is 54.5
OA C
Source: GMAT Prep
We have to get the value of c.
Let's take each statement one by one.
(1) The hundredths digit of x is 5.
=> x = ab.c5. Can't get the value of c. Insufficient.
(2) Number x, rounded to the nearest tenth, is 54.5.
Case 1: x = 54.5d, if d ≤ 4
Case 2: x = 54.4d, if d ≥ 5
Since the value of d is unknown, the unique value of c cannot be known. Insufficient.
(1) and (2) together
Thus, only Case 2 is applicable; hence, c = 4. Sufficient.
The correct answer: C
Hope this helps!
-Jay
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