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

Complete the table series riddle by finding the number that can replace "??".

What does this rebus means ?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

He runs but never walks. Murmurs, but never talks. Has a bed, but never sleeps. And has a mouth, but never eats?

How can you leave a room with two legs and return with six legs?

A Japanese ship is sailing in the Indian Ocean. The captain of the ship feels tired and decides to take shower to be rejuvenated. He goes to take the shower after keeping his diamond-studded Rolex watch and gold chain on the table.
When he comes back after 15 minutes, he finds them missing. There are 4 crew members on the ship and he calls them one by one to ask them what they were doing in that duration.

Following are the answers:
1. Crew 'A' who is the cook replies that he was cooking mutton for the crew members.
2. Crew 'B' who is a housekeeper tells that he was sleeping in his room.
3. Crew 'C' who is the engineer says that he was checking on the generator.
4. Crew 'D' who is another housekeeper says that he was correcting the hoisted flag that was put upside down.

It took only a couple of seconds for the captain to find the thief. Can you find the thief too?

Before Mount Everest was discovered, what was the highest mountain in the world?

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?