What is full of holes but still holds water?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

Find the mistake in the below maths equations

A = 2
A(A-1) = 2(A-1)
A2-A = 2A-2
A2-2A = A-2
A(A-2) = A-2
A = 1

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

There is a straight highway. Four different villages lie on that highway. The distance between them is different. The third village is 60km away from the first village; the fourth is 40 km away from the second; the third is 10 km near to the fourth that it is to the second.

Can you calculate the distance between the fourth and the first village ?

The captain of a ship was telling this interesting story: "We travelled the sea far and wide. At one time, two of my sailors were standing on opposite sides of the ship. One was looking west and the other one east. And at the same time, they could see each other clearly." How can that be possible?

I am an odd number. Take away a letter and I become even. What number am I?