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?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

Let's play a word game. Following are some meaningless words that can be completed by adding random letters on either side of the word.

For example, the word "rdo" can be formed into "pardon".

Using the same technique, can you complete the given words?
ecalc
airb
rinci
tibac
uidel
gorit
igna
eyho

Three fair coins are tossed in the air and they land with heads up. Can you calculate the chances that when they are tossed again, two coins will again land with heads up?

Can you count the number of quadrilaterals in the picture below?

I have branches, but no fruit, trunk or leaves. What am I?

What has many keys but can’t open a single lock?

How do you go from 98 to 720 using just one letter?

Why Aeroplane windows are round?