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27 Jan 2021, 00:08
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E
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Difficulty:
75%
(hard)
Question Stats:
55% (02:18) correct
45%
(02:21)
wrong
based on 88
sessions
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Time
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what is the sum of 4 consecutive odd integers?
1) Sum of the four integers < 350
2) Sum of the four integers when divided by 10 becomes a perfect square
1) Sum of the four integers < 350
2) Sum of the four integers when divided by 10 becomes a perfect square
Source: https://www.GMATinsight.com
Pure algebraic questions like this one are no longer part of the GMAT Data Sufficiency syllabus.
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30 Jan 2021, 01:08
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GMATinsight
Answer: Option E
Video solution by GMATinsight
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01 Feb 2021, 02:53
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GMATinsight
target find sum of 4 consecutive odd integers
which can be written in form x-4,x-2,x,x+2,x+4
we get sum of odd integers as two forms ; 4x+4 and 4x-4
#1
Sum of the four integers < 350
here value of x can be 1,3,5,7 , 11,... so on insufficient
#2
Sum of the four integers when divided by 10 becomes a perfect square
or say
4x+4/10 ; 2x+2/5 is perfect square which is possible when x= 39 ; insufficient
and 4x-4/10 ; 2x-2/5 is perfect square at x= 11 ;
we dont get 1 single value of x ; insufficient
from 1 &2
we see at x= 11,39 we get our sum value less than 350 insufficient
option E
