How many triangles are there on the puzzle below?

Replace the question mark with the correct number.

2 + 2= 4
3 + 3= 18
4 + 4= 48
5 + 5= ?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

Decode the below four famous ciphers:

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

You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?

A man was convicted of a minor offence in Akbar court. Akbar decided to give him a chance. He asked him to give a statement. If the statement is true, he will be killed by lions and if it is false, he will be killed by trampling of wild elephants.

The convicted person requested help from Birbal and since the crime was not a big one, Birbal decided to help him. Whatever Birbal suggested impressed Kabir and he let the convicted person go.

What did Birbal suggest to the person?

Intelligence Agency need to break the vault but the problem is that they are not able to break the vault.

On the vault, a text is written as:

31 11 33 33 43 45
21 25
31 24 11 31 51 41

To Break the code Intelligence Agency brings a mathematician named Joseph.
Minutes later he deciphers the code.

Whats the code?

Remove two matchsticks to make the below equation correct.

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

An artist while painting a scenic beauty, decides to paint three layers of blue colour on the sky.

Which layer will go on the first?