Question

X is a factor of Y. Y is a factor of Z.
In this context, which of the following sets has HCF = X?

Answer 1

Answer:

Step-by-step explanation:

(X , Y) , (X , Z) , (X , Y , Z)

Answer 2

Answer:

aX is a factor of Y

⇒ L.C.M. of X and Y = X

Y is a factor of Z

⇒ L.C.M. of Y and Z = Y

Also, L.C.M. of X and Z = X

And L.C.M. of X, Y and Z = X

So, The required pair of set which has L.C.M. Y = Y and Z