You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

Through your logical capabilities, can you make 7 an even?

What has 88 keys?

The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?

Living above a star, I do not burn
Eleven friends and they do not turn
I can just be visited in a sequence, not once or repeatedly
PQRS are my initials
Can you tell my name accurately?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

People make me, save me, change me, raise me. What am I?

A dying old man wants to divide his entire land between his only two sons. Since his only wish is to treat them as equal as both of them have been too good to him, he wants to divide his land equally between them. The problem is that the land is significantly irregular in shape and thus there is no choice of cutting them into two equal halves.

Can you help him divide the land in a manner that both of his sons will be happy?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?