Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

What 5-letter word typed in all capital letters can be read the same upside down?

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?

What animal walks on four legs in the morning, two legs during the day, and three legs in the evening?

Oedipus, the king of Thebes, figured out the answer to the riddle:

You can find some missing letters in the picture. By placing two particular letters in the spaces, you can form a nine lettered word beginning from one of the corners and going clockwise direction to the middle. Can you find out the letters and the word?

Can you name an animal whose killing cannot be performed without spilling your own blood?

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

I went to the bookshop and spent one-half of the money that was in my purse.

When I came out, I found that I had as many cents as I had dollars and half as many dollars as I had cents when I went in. Find the money in my purse when I entered the store.

There once were seven dwarfs who were all brothers. They were all born two years apart. The youngest dwarf is seven years old. How old is his oldest brother?