If X and Y are integers greater than 1, is X amultiple of Y?
1)3Y^2+7Y=X
2)X^2 - X is a multiple of Y
1)3Y^2+7Y=X
2)X^2 - X is a multiple of Y
Given x,y>1
x= my
ST 1
3y^2+7y = x
===> y(3y+7) = x
x = my wherein m = 3y+7
Therefore sufficient
St 2
x^2-x=ny
x(x-1) = ny
x=5 Therefore LS = 5*4=20
Therefore ny = 20 and values could be as follows
y n
2 10
4 5
5 4
10 2
20 1
All do not satisfy x= my therefore not sufficient
IMO - Ans A
