How many times do a clock's hands overlap in a day ?

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?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

Why are televisions attracted to people?

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?

If you read clockwise, you can form a word by inserting three missing letters in the picture given below. Can you do it?

Find the missing number in the image below.

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

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

In a box, there is a jumble of 7 red balls, 6 blue balls, 5 green balls, and 4 yellow balls. What is the minimum number of balls, will you have to pick up so that you have at least 4 balls of the same colour?