The person who makes it has no need for it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

Find the next number in the following series:
6, 14, 26, 98, __?

You’re out on the water and see a boat filled with people. You look away for a second and look back again, but this time you don’t see a single person on the boat. Why? Hint: The boat did not sink.

A detective visits his friend John just to discover that John's neighbour Dr Jacob was murdered. Dr Jacob, who is a mathematician wrote the murderer's name in a code word "Hcqtfz". There were five suspects
1. Ajit
2. Pankaj
3. Ganpat
4. Deenu
5. Hariya

The Detective was instantly able to find the murderer.
Can you?

The current time can be represented by below textual rebus.

0
=========
B.Sc
LLB

Can you tell us the current time?

What does the below rebus riddle means?

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

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