GRE Prep Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customized
for You
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
The percentage of integers from 1 through 100 whose squares
[#permalink]
29 Apr 2019, 01:50
29 Apr 2019, 01:50
Expert Reply
1
Bookmarks
00:00
Question Stats:
47% (01:55) correct
52% (01:54) wrong based on 36 sessions
Hide Show timer Statistics
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
[#permalink]
06 May 2019, 07:43
06 May 2019, 07:43
1
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
[#permalink]
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.
