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

Name a key which is hardest to turn.

A chicken farmer has figured out that a hen and a half can lay an egg and a half in a day and a half. How many hens does the farmer need to produce one dozen eggs in six days?

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

Can you replace the question mark with the correct number in the below table sequence?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

The LCD device should be able to tell the right time in the format HH:MM: SS in a 12-hour format. You can refer to the picture to get an idea. The device is a simple "level indicator" which has to be converted into a watch. How will you program it to work?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

If,
9 * 8 * 7 = 65
8 * 7 * 6 = 50
7 * 6 * 5 = 37

Find
6 * 5 * 4 = ?

Spot 5 differences in two Christmas tree below: