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25 Nov 2022, 10:30
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C
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Difficulty:
5%
(low)
Question Stats:
94% (01:07) correct
6%
(02:14)
wrong
based on 86
sessions
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N is a positive 3-digit integer with hundreds digit x and units digit y. Which of the following must be a factor of N – 100x – y ?
A. 3
B. 4
C. 5
D. 6
E. 7
A. 3
B. 4
C. 5
D. 6
E. 7
25 Nov 2022, 10:51
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N-3digit number(xby),which can be written as 100x+10b+y.
N=100x+10b+y
N-100x-y=10b, where b can be anything between 0 and 9.
10b= 2*5*b, So 2 & 5 are definitely a factor.
Hence C is the correct choice.
Posted from my mobile device
N=100x+10b+y
N-100x-y=10b, where b can be anything between 0 and 9.
10b= 2*5*b, So 2 & 5 are definitely a factor.
Hence C is the correct choice.
Posted from my mobile device
25 Nov 2022, 13:55
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Let N = xzy
N can be represented as 100x + 10z + y
N - 100x - y = 10z
Must factor of 10z = 2 & 5
Option C
N can be represented as 100x + 10z + y
N - 100x - y = 10z
Must factor of 10z = 2 & 5
Option C
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