Can you make four (4) nines (9) equal 100?

John and his wife were living in a rural place. On a particular day, John's wife fell ill and he called the local doctor. When the doctor picked up, he said, "Doctor, my wife is ill. She might have appendicitis."

"This can't be possible! I took out her appendix two years ago myself," the doctor explained.

When diagnosed, John's wife was found to have appendicitis. How can this be possible?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

Who always enjoys poor health?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

In a mathematical quiz, you are asked the following question:

Use three 9s in a mathematical expression without dividing or multiplying to form the number one.

Can you answer the question?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

This is a most unusual paragraph. How quickly can you find out what is so unusual about it? It looks so ordinary, you'd think nothing was wrong with it. Actually, nothing IS wrong with it. But it is not as ordinary as you might think. If you think about it for a bit, you will find out why it is truly so unusual. So what is it? What is so unordinary about this paragraph?

People put me on the table and cut me but do not eat me. What am I?

Can you solve the rebus below?