It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

While going to your grandmother's house, you counted Twenty houses on the right side. While returning back to your home, you counted Twenty houses on the left side.

How many houses are there between your home and your grandmother's home?

Two-person want to cross a river. Only one boat is present on the riverside that can carry only one person at a time.

However, they still manage to cross the river. How is it possible?

Which alphabet letter is a question?

There is a barrel with no lid and some wine in it. 'This barrel of wine is more than half full,' said Curly. 'No it's not,' says Mo. 'It's less than half full.' Without any measuring implements and without removing any wine from the barrel, how can they easily determine who is correct?

When we see 2 but call 10?

What is next number in the pattern below:

131 517 192 123 ?

Once upon a time, there was a castle on a square island. The entire island was surrounded by a 14m wide trench. The Romans had wanted to invade the castle and had brought a few wooden planks along with them to facilitate themselves in crossing the moat. The planks were however found to be only 13m long.

The Romans still managed to cross the trench. How did they do it?

Decode the below four famous ciphers:

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