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02 Nov 2016, 03:00
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If m is an integer, is m^4 divisible by 5?
(1) m is divisible by 2
(2) m^3 is divisible by 125
(1) m is divisible by 2
(2) m^3 is divisible by 125
nayakr1127
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02 Nov 2016, 03:06
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Bunuel
If m is an integer, is m^4 divisible by 5?
(1) m is divisible by 2
(2) m^3 is divisible by 125
B(1) m is divisible by 2
(2) m^3 is divisible by 125
Sufficient to know 125 as a factor.
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Vinayak Shenoy
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02 Nov 2016, 03:41
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Bunuel
If m is an integer, is m^4 divisible by 5?
(1) m is divisible by 2
(2) m^3 is divisible by 125
(1) m is divisible by 2
(2) m^3 is divisible by 125
IMO B
from statement 1
m=6 in this case m^4=1296 not divisible by 5
m=10 in this case m^4=10000 divisible by 5
hence insufficient
from statement 2
minimum value of m=5 as m^3 is divisible by 125
so value of m can be 5 or multiples of 5 (5, 10, 15, 20, 25 etc)
hence sufficient
