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BIGDAMNGOD
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29 May 2020, 05:51
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
74% (01:30) correct
26%
(01:13)
wrong
based on 125
sessions
History
Date
Time
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Not Attempted Yet
4.7☆◎3
If ☆ and ◎ each represent single digits in the decimal above, what digit does ☆ represent?
(1) When the decimal is rounded to the nearest tenth, 4.8 is the result.
(2) When the decimal is rounded to the nearest hundredth, 4.77 is the result.
If ☆ and ◎ each represent single digits in the decimal above, what digit does ☆ represent?
(1) When the decimal is rounded to the nearest tenth, 4.8 is the result.
(2) When the decimal is rounded to the nearest hundredth, 4.77 is the result.
yashikaaggarwal
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29 May 2020, 06:19
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4.7[][]3
Statement 1: Rounding off to near tenth digit it will give 4.8
since one no. Is added so the hundred digit after 7 will lie in the range of (5,6,7,8,9)
(Not sufficient)
Statement 2: Rounding off to the near hundred 4.77 will be the answer so the range of thousands will be 4.7{*}{0,1,2,3,4,5,6,7,8,9}
(Since we don't know whether the thousand digit lies in upper 5 digits or lower 5
(insufficient)
1&2 together:
Hundred digit will be in set of (5,6,7,8,9) and thousand will be in {0,1,2,3,4,5,6,7,8,9}
(Still no particular answer)
(Insufficient)
Answer is E
Posted from my mobile device
Statement 1: Rounding off to near tenth digit it will give 4.8
since one no. Is added so the hundred digit after 7 will lie in the range of (5,6,7,8,9)
(Not sufficient)
Statement 2: Rounding off to the near hundred 4.77 will be the answer so the range of thousands will be 4.7{*}{0,1,2,3,4,5,6,7,8,9}
(Since we don't know whether the thousand digit lies in upper 5 digits or lower 5
(insufficient)
1&2 together:
Hundred digit will be in set of (5,6,7,8,9) and thousand will be in {0,1,2,3,4,5,6,7,8,9}
(Still no particular answer)
(Insufficient)
Answer is E
Posted from my mobile device
30 May 2020, 06:38
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yashikaaggarwal
The answer is indeed E, but there are nowhere near that many possibilities when you use both Statements.
If Statement 2 is true, the number needs to be close to 4.77 in value -- it needs to be in between 4.765 and 4.775. But any number in that range rounds off to 4.8 if you round to the nearest tenth, so Statement 1 is no further help. So we can't tell if the hundredths digit is 6 or 7, and the answer is E.
If one wanted to confirm with numerical examples, the original number could be 4.7683 for example, but it could be 4.7733.
