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26 Oct 2016, 02:17
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C
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Difficulty:
65%
(hard)
Question Stats:
50% (01:52) correct
50%
(01:52)
wrong
based on 129
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If a = c • 10^b and a and b are integers, what is the value of b?
(1) c has nonzero digits in only the tenths, hundredths, and thousandths places.
(2) 1 < b < 4
(1) c has nonzero digits in only the tenths, hundredths, and thousandths places.
(2) 1 < b < 4
26 Oct 2016, 05:53
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duahsolo
Stat 1: Let c = 123.xyz ( here x,y and z tenths, hundredths, and thousandths places respectively)
c • 10^b = a , in order to get a as an integer then b has to be 3, but we don't have such clear information about b...NS.
Stat 2 : b can be 2 or 3...but here we aren't told about c value...NS.
Both: When b = 2 we get a = 123x.yz and this is not a integer.
When b = 3 we get a as integer...Sufficient.
Option C.
11 Mar 2017, 00:11
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i think the question should be reworded. I interpreted 'tenths, hundreds, and thousands' places as 12345 (e.g., not as decimals). or am i just slow?
