Why Wine Glass Stem is so long?

There are four 3-link chains. All you have to do is join them into a big 12-link chain. For joining two closed links, one of the links must be cut and placed onto the other link for closing.

How many minimum links will you have to cut to make the big chain?

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

A man looks at a painting in a museum and says, “Brothers and sisters I have none, but that man’s father is my father’s son.” Who is in the painting?

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

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

There’s a girl who has a large family. She has an equal amount of brothers and sisters, but each brother only has half as many brothers and sisters. What’s the correct amount of brothers and sisters?

There was a strange boy who was born before his father. How can this be possible?

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?