MGMAT DS question -Ans makes sense??
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chidcguy
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This a good Q and I bit the dust the first time I saw similar Q. Here is how I am solving going forward.
(1) The hundredths digit of x is 5
Doesn't tell any thing about tenth's digit
(2) Number x, rounded to the nearest tenth, is 54.5
It tells us that there is a number X and was rounded to get 54.5. So We need to know what all numbers can be rounded to 54.5 and if all of them have the same tenth's digit
54.4[5-9] and 54.5[0-4] when rounded up/down will all give 54.5 So that means the tenths can be either 4 or5. Not sufficient
Both statements together fix the hundreth's digit of the above possibilities. if hundredth's is 5 and the rounded number is 54.5 the tenths must be 4.
(1) The hundredths digit of x is 5
Doesn't tell any thing about tenth's digit
(2) Number x, rounded to the nearest tenth, is 54.5
It tells us that there is a number X and was rounded to get 54.5. So We need to know what all numbers can be rounded to 54.5 and if all of them have the same tenth's digit
54.4[5-9] and 54.5[0-4] when rounded up/down will all give 54.5 So that means the tenths can be either 4 or5. Not sufficient
Both statements together fix the hundreth's digit of the above possibilities. if hundredth's is 5 and the rounded number is 54.5 the tenths must be 4.
