Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

You are in a land where thirty men and two women were dressed in classic black and white dresses.
They begin to fight as soon as any of them move.

Where are you?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

Spot the cat in the picture below

What am I?

What Adam and Eve do not have but the rest of the people have?

A time long back, there lived a king who ruled the great kingdom of Trojan House. As a part of the renovation of the kingdom to meet future security needs, he asked his chief architect to lay down a new play in a manner that all of his 10 castles are connected through five straight walls and each wall must connect four castles together. He also asked the architect that at least one of his castles should be protected with walls. The architect could not come up with any solution that served all of King's choices, but he suggested the best plan that you can see in the picture below. Can you find a better solution to serve the king's demand?

Replace the 'X' with any mathematical symbol to make the expression equal to 111.

18 X 12 X 2 X 3 = 111

Can you decipher the two rows to find the hidden word?