What does below pictogram mean?

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

You can see three almost identical images below. Can you spot the odd one out from them?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

There is something which is always coming but never arrives?

Manish has to secure 40% marks to pass his B.tech final exams.
He got just 40 marks and failed by 40-marks.

What is the maximum marks?

A man embarked on a questionnaire game. He kept asking the same question to whomever he found. The answer each time was different.

Can you guess what the question was?

You have two rectangular wires.

Both of them have property that when you light the fire from one end , it will take 60 minutes to get completely burn.

However, they do not burn at consistent speed (i.e it might be possible 1st 20% burn in 50 minutes and 80% can burn in 10 minutes).

So how could you measure 45 minutes ?

John and Jenni are a married couple. They have two kids, one of them is a girl. Assume safely that the probability of each gender is 1/2.
What is the probability that the other kid is also a girl?

Hint: It is not 1/2 as you would first think.

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'