using four eights (8) and a one (1) and one mathematical symbol , create the number 100

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

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

How is the moon similar to a dollar?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

There was once a troop of 5 elves. The 5 elves were very dedicated on finding the magical treasure of 1000 coins. However, being elves, they were super geniuses, very greedy and they did not hesitate in taking lives of other elves. The 5 elves were named Aye, Bee, Cee, Dee and Ee, ranked from high to low respectively, from Aye to Ee. One fine day, their efforts brought results and they found 1000 coins. Now they had to split it in between them as per their ranks. The lowest ranked elf has to make the proposal. If the proposal is accepted by majority, it is agreed, or the suggesting elf is killed.

What proposal should elf Ee make ?

What's the only room from which no one can enter or leave

What has many teeth, but cannot bite?

I was born in a small house and I live in it all alone. No windows and no doors have been assigned to my house. The only way I can go out is by breaking through the walls of my house.

Who am I?