Out of four images which one is the odd one out?

What does below chemistry rebus means?

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

O T T F F S S ?

Analyze and find the missing item in the sequence:
16, 06, 68, 88, __, 98

Two fathers and two sons went fishing one day. They were there the whole day and only caught 3 fish. One father said, that is enough for all of us, we will have one each. How can this be possible?

Can you identify if it's a murder or a suicide ?

It belongs to you, but other people use it more than you do. What is it?

A father's child, a mother's child, yet no one's son.

Who am I?

I had an infinite supply of water and 5 litres and 3 litres jars.

How would you measure exactly 4 litres in the least number of steps?

Find the number of squares in the below-given picture.