There was a man he lives in a hotel each morning he presses the first floor button each evening if there is a person in the elevator he asks him to press the 10 floor button if there is no one in the elevator he takes the stairs why.

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?

What can you catch but never throw?

What type of tree can I carry in my hand?

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?

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

Count the number of lines in the image below ?

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 tell a 3D object that has just two surfaces?

I have teeth but i don't bite. Who Am I ?