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08 Oct 2007, 13:07
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N
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plz explain...thx
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Hi there,
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08 Oct 2007, 13:25
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I'm also getting B but since you've put this here I assume B is wrong.
Stat 1:
x = 40, y = 10, HCF = 10, xy is a multiple of 8.
x= 10, y = 10, HCF = 10, xy is not a multiple of 8.
Insuff.
Stat 2:
Since LCM of x and y is 100, the prime factorization of x & y has to be 2^2*5^2. This is never divisible by 8. Suff.
I'm not very sure of my analysis of the 2nd statement.
Stat 1:
x = 40, y = 10, HCF = 10, xy is a multiple of 8.
x= 10, y = 10, HCF = 10, xy is not a multiple of 8.
Insuff.
Stat 2:
Since LCM of x and y is 100, the prime factorization of x & y has to be 2^2*5^2. This is never divisible by 8. Suff.
I'm not very sure of my analysis of the 2nd statement.
08 Oct 2007, 13:46
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12345678
C it is.
The common factors in the two numbers are HCF.
The common factors in the two numbers + the remainders
LCD*GCD= product of the numbers.
St.1.....not sufficient numbers can be anything 10, 80, 40.....
some are multiple of 8 and some not though they still have the GCD of 10.
St.2 ....not sufficient. X and Y can be 100 and 1 ( not multiple of 8 though LCD is 100) or
X and Y can be 100 and 10 ( 1000 /8 =125, multiple of 8 and LCD is 100).
Both taken togather.....100( LCD)*10(GCD)=1000=XY
