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Updated on: 21 Jul 2018, 00:19
Originally posted by franteraoka on 20 Jul 2018, 22:17.
Last edited by Bunuel on 21 Jul 2018, 00:19, edited 1 time in total.
Last edited by Bunuel on 21 Jul 2018, 00:19, edited 1 time in total.
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
55%
(hard)
Question Stats:
66% (01:51) correct
34%
(01:43)
wrong
based on 281
sessions
History
Date
Time
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Not Attempted Yet
If <<n>> denotes the least positive integer multiple of 4 that is greater than or equal to integer n, what is the value of n ?
(1) <<n>> = 12
(2) n is equal to the sum of two consecutive prime numbers.
(1) <<n>> = 12
(2) n is equal to the sum of two consecutive prime numbers.
The answer is C. What does the extra << mean? and would someone please explain the answer? thank you so much!
21 Jul 2018, 20:33
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If <<n>> denotes the least positive integer multiple of 4 that is greater than or equal to integer n, what is the value of n ?
this means either
A) <<n>>=n, if n is multiple of 4 that is form of 4k, where k is an integer
B) <<n>>=n+1 to n+3......
So range is n to n+3
(1) <<n>> = 12
So n can be 9 to 12
Insufficient
(2) n is equal to the sum of two consecutive prime numbers.
n can be
a) 2+3=5
b) 3+5=8......and so on
Insufficient
Combined..
Only way when n is odd is when one is 2, so 2+3=5
Otherwise even..
Therefore it can be 10 or 12
10=5+5=3+7, so not possible to show it as sum of two consecutive prime numbers.
12=5+7....our answer
Sufficient
this means either
A) <<n>>=n, if n is multiple of 4 that is form of 4k, where k is an integer
B) <<n>>=n+1 to n+3......
So range is n to n+3
(1) <<n>> = 12
So n can be 9 to 12
Insufficient
(2) n is equal to the sum of two consecutive prime numbers.
n can be
a) 2+3=5
b) 3+5=8......and so on
Insufficient
Combined..
Only way when n is odd is when one is 2, so 2+3=5
Otherwise even..
Therefore it can be 10 or 12
10=5+5=3+7, so not possible to show it as sum of two consecutive prime numbers.
12=5+7....our answer
Sufficient
General Discussion
20 Jul 2018, 22:28
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franteraoka
Hi franteraoka
Just a suggestion. Please don't post the answer in plain text. I see you are already using the spoiler tag which is enough if somone wants to know the answer before trying the problem. I just feel seeing the answer before trying out the problem kills the eagerness to solve the problem, atleast in my case.
