What goes up but never comes down?

A man dies of old age on his 25 birthday. How is this possible?

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?

A river should be crossed by a father, a mother and their two sons and two daughters.
There are some rules that should be followed while crossing the river. There can be only two people in the raft while crossing. The daughters cannot be with their father unless there is the presence of the mother. The sons cannot be with their mothers unless the father is present. Unless the guard is on the board, the criminals cannot be with any of the family members. Only the adults like the father, the guard, and the mother knows to use the raft.

How will they cross the river?

What building has the most stories?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

what's the probability of getting a king or a queen from a pack of 52 cards?

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

Remove two matchsticks to make the below equation correct.

A man wants to cross the pit of fire which is 25 feet in length and he has 2 planks(fire resistant) 19 feet in length. How can he cross the pit of fire alive?