Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

I know a nine-letter word having only one vowel.
Do you ?

Which tank will fill first?

What can you deduce from the following BrainBat?

CRY
LMKI

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?

Which digit occurred maximum times between the number 1 and 1000?

One night, a man runs away from home. He turns left and keeps running. After some time he turns left again and keeps running. Later, he turns left one more time and runs back home—but when he gets home, he finds a man in a mask. Who was the man in the mask?

You walk into a room and see a bed. On the bed, there are two dogs, five cats, a giraffe, six cows, and a goose. There are also three doves flying above the bed. How many legs are on the floor?

Decode below three cipher riddles:

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

The more it dries, the wetter it becomes. Can you tell what it is?