Replace the question mark with the correct number in below Picture:

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

If we tell you that there is a relation between the numbers and letters in the given figure, can you analyze it and find the missing letter in the last box?

You measure my life in hours
I serve you by expiring
I vanish faster when I am thin
and slower when I am thick
The wind is my energy
What am I?

They are three errirs in this question. Can you find them?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

A family is trapped in a jungle. There is a bridge which can lead them to safety. But at one time, the bridge can only allow two people to pass through. Also, all of them are afraid of the dark and thus, they can't go alone.

Father takes 1 minute to cross, the mother takes 2 minutes, the son takes 4 and the daughter takes 5 minutes. While crossing the time taken will be according to the slower one. How can they all reach the other side in the minimum possible time?

In the given picture, you can find two letters missing. When two particular letters are placed in the missing spots, you get an eight-letter word while reading in the anti-clockwise direction. Can you find out the missing letters and the missing word eventually?

Which English verb becomes past tense just by rearranging the letters?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?