What does does this rebus picture means ?

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?

You walk into a room where there are three primates held in their respective cages:
1) A lion who is eating the flesh of a goat.
2) An orangutan who is playing with blocks.
3) A donkey who is sitting idle.

Who is the most intelligent primate in the room?

Can you find the hidden animal in the picture below?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

When monkey rotate the gear, which mark will be hit 1 or 2 ?

I’m tall when I’m young, and I’m short when I’m old. What am I?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

Be active and find the killer in the picture Riddle below.