Six friends A, B, C, D, E and F are sitting in a row facing East. C is between A and E. B is just to the right of E but left of D. F is not at the right end. Who is to the left of A?

According to question,
We can draw a figure , in which C is between A and E. B is just to the right of E but left of D. F is not at the right end.
From it is clear that , F is at the left end .
Sitting sequence :-

Draw a figure on the basis of above given question ,
A is right side of B and left side of C. O is in the right side of A. B is right of D.
As shown in figure , A house is in the middle
Sitting sequence :-

Draw a figure on the basis of above given question ,
T is on the right of Z. M is on the left of Z but is on the right of L .T is on the left of Q.
As shown in figure , L is sitting first from the left .
Sitting sequence :-

According to question,
We can draw a figure , in which Harish sits on the right of Satish. Satish sits between Manish and Girish.
As shown in figure , Harish is sit farthest to the right.
Sitting arrangement :-

We can draw a figure , As per the details of arrangement is given in above question ,A is right side of B and left side of C. O is the right side of A, B is right of D.
It shows that the house A is in the middle.
Arrangement of Houses :-

According to question,
We can draw a figure , in which Mohan is between Balu and Raju and Raju is to the immediate right of Praveen and Amith is to the right of Balu.
As shown in figure , Amith is in extreme right end .
Sitting arrangement :-

According to question,
We can draw a figure , in which Subbu is to the left of Pappu, Revathi is between Subbu and Nisha, Aruna is between Pappu and Keerthana.
As shown in figure , Subbu is to the left of Pappu.
Sitting sequence :-

Draw a figure on the basis of above given question ,
the father was found to be sitting to the left of the son and right to the grandfather. Mother was sitting to the right of her daughter but left to the grandfather.
As shown in figure , Grandfather is occupying the central place .
Sitting arrangement :-

Draw a figure on the basis of above given question ,
S is between T and Q and Q is to the immediate left of R. P is to the immediate left of T.
As shown in figure , S is in the middle.
Sitting arrangement :-

Draw a figure on the basis of above given question ,
Y is at the left of X, W is sitting at the right of Z. V is sitting at the right of X and W is sitting at the left of Y. If Z is sitting at one end of the row .
From figure , It shows that Y is in the middle.
Sitting arrangement :-