Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

Can you find the ages of a son, father and grandfather based on the following facts?
The sum of the ages of grandfather, father and son is 140 years.
The age of the son in months is the same as the grandfather in years.
The age of the son in days is the same as the father in weeks.

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

O T T F F S S ?

If 21x = 79x, what is the value of x?

You and your two friends are working in a multinational company. How can you three find out the average salary of you all without disclosing your own salary to the other two?

Which is heavier: a ton of bricks or a ton of feathers?

Can you replace the question mark with the correct number in the below table sequence?

Thirty friends were on a hiking trip when they decided to enjoy the bonfire. They assembled for it and agreed to play a game. For that, they divided themselves into five teams with seven members each, forming five rows.

How did they manage to achieve this formation?

Today, I celebrated my 32nd birthday but I was born in 1972.
How is this possible?

Can you decipher the below rebus?

PBLUESAISNUERSES