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The percentage of integers from 1 through 100 whose squares
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29 Apr 2019, 01:50
29 Apr 2019, 01:50
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48% (01:52) correct
51% (01:54) wrong based on 37 sessions
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The percentage of integers from 1 through 100 whose squares end with the digit 1 is x%, and the percentage of integers from 1 through 200 whose squares end with the digit 1 is y%. Which one of the following is true?
(A) x = y
(B) x = 2y
(C) x = 4y
(D) y = 2x
(E) y = 4x
(A) x = y
(B) x = 2y
(C) x = 4y
(D) y = 2x
(E) y = 4x
Re: The percentage of integers from 1 through 100 whose squares
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06 May 2019, 07:43
06 May 2019, 07:43
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from 1 through 100 =20 integers' squares ending with 1 while 40 integers' squares ending with 1 for the integers 1 through 200. So, by percentage it is the same i.e. (20/100 and 40/200).
X=Y
X=Y
Re: The percentage of integers from 1 through 100 whose squares
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06 May 2019, 09:33
06 May 2019, 09:33
1
so between to to hundred there are 20 number which are 1,9,11,19,21,29,31,39,......91,99 whose square is ends in 1.
so percentage is 20/100=0.2.
and there are 40 number between 1 to 200 whose square end up with 1.
so percentage is 40/200=0.2
so x=y.
answer is A.
so percentage is 20/100=0.2.
and there are 40 number between 1 to 200 whose square end up with 1.
so percentage is 40/200=0.2
so x=y.
answer is A.
