What is the earliest time when Ajay can complete all tasks?

_ > _ > _ > _ C > A, E ...........(i)
B > D > _ > _ > _ > _ ...........(ii)
Since E did not score the least, we get B > D > F (81) > C > E (62) > A
is the correct answer; B's score is maximum according to above sequence. F has scored 81 marks. Then B's score = 81 + 13 = 94 marks and D is between B and F. D is most likely to score 89 marks.

As per the given above question , we have
P, Q, R, S, T, V and W are sitting in a straight line facing north. Each one of them lives on a different floor in the same building which is numbered from one to seven. Q sits fourth to the left of the person living on the 6th floor. Either Q or the person living on the 6th floor sits at the extreme ends of the line.
From above it is clear that Q person live on the 6th floor .

On the basis of above given question , we can say that The floor number of every person is written by increasing 1 in their actual floor number but that of Q it is written by decreasing 1.Hence , Q is correct answer .

From the given above question , we can say that
In row 1, P, Q, R, S and T are seated and all of them are facing south. In row 2, A, B, C, D and E are seated and all of them are facing north.
In all other, the second is the neighbour of the one facing the first.R and A is the one that does not belong to that group .

From the above solution E start from 2 pm.

Given takes are A, B, C, D, E (here we will assume the condition to complete the work at the earliest)
From the 1^stcondition- Task A ? from 11 am to 9 am to 11 am,
From the 2^nd condition B ? From 11 am to 12 noon (Since it has started after completion of A)
From the 3^rd condition C ? From 12 noon to 1 pm
Task D's one hour work will be done along with B.
D's second hour work will be done along with C.
Hence to commence E, D must complete 3 hrs.
Hence timing of task D ? from 11 am to 2 pm and
After this the remaining task E ? From 2 pm to 3 pm

There are five tracks T1 T2 T3 T4 T5
Chines ---Indian (Chinese is let o Indian)
Chinese Indian and the Iraqi Nepalese Iraqi/Indian Englishmen.
Hence the Indian and the Iraqi should be in track 2 and track 4 in any order.

There are five tracks T1 T2 T3 T4 T5
Chines ---Indian (Chinese is let o Indian)
The arrangement with the given condition is not possible as it contradicts the given conditions.

There are five tracks T1 T2 T3 T4 T5
Chines ---Indian (Chinese is left of Indian)
The arrangement in this case could be :
Nepalese Iraqi Englishman Chinese Indian
So Iraqui will be on track 2.