Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

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 it's bad luck to meet a black cat?

Two guards were on duty outside a barracks. One faced up the road to watch for anyone approaching from the North. The other looked down the road to see if anyone approached from the South. Suddenly one of them said to the other, "Why are you smiling?"

How did he know his companion was smiling?

Today, I celebrated my 32nd birthday but I was born in 1972.
How is this possible?

Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

In the picture that is attached with this question, you can find a square which comprises of four little squares inside it. Consider this square to be made with matchsticks. You have to remove two matchsticks such that only two squares remain instead of five.How will you do it ?

Identify the 10 differences between the two given pictures.

What brings you down but never up?

What number comes next in the series?

5 15 5 18 5 24 14 20 _