Solve the mathematical equation in the picture below.

I cannot talk, but I always reply when spoken to. What am I?

People make me, save me, change me, raise me. What am I?

There are hundred red gems and hundred blue gems. The blue gems are priceless while the red gems equal wastage. You have two sacks one labeled Heads and the other Tails. You have to distribute the gems as you want in the two sacks. Then a coin will be flipped and you will be asked to pick up a gem randomly from the corresponding sacks.

How will you distribute the gems between the sacks so that the odds of picking a Blue gem are maximum?

Replace the 'X' with any mathematical symbol to make the expression equal to 111.

18 X 12 X 2 X 3 = 111

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

Decode the below four famous ciphers:

8P of the SS
1M of the E
1S of the SS
60M in 1H

Why is the Hole below a Lock?

You need to move three matchsticks to form three squares. Can you do it?

Which is Odd One Out and why?

4377

3954

9862

8454

9831