Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

I look at you, you look at me I raise my right, you raise your left. What am I?

What have one eye but still cannot see?

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?

When we see 2 but call 10?

If "P" means "-", "Q" means "/", "R" means "+", and "S" means "*" then find the value of the following:

21 Q 7 R 9 S 10 P 13

What building has the most stories?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

A man is found unconscious in front of a store at two in the morning. His head is bleeding and there’s a brick laying next to him. When the police arrive, they carry the man to jail. Why did they arrest him?

Decode the below four famous ciphers:

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