Can you find out the remainder when 3^300 is divided by 5?

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?

Can you count the number of triangles in the given figure?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

Find the next number in the sequence

1, 2, 6, 21, 88, __?

What do you see in the image below

Write the next letter in this sequence.
O, T, T, F, F, S, S, E, __
**Hint: It is a Number Series Puzzle