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?

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

Can you move 2 matchsticks to form four equal sized squares.

What number should come in place of the question mark below?

Decode below rebus
D
N
A
T
S , D

Different lights make me strange by changing me into different sizes. What am I?

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

You can hear me, but you can't touch or see me.

What am I?

Can you make a six-letter word using the letters N, A and B ?

Take one out and scratch my head, I am now black but once was red. What am I?