A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

How many triangles are there in the picture below?

There is one four-digit whole number n, such that the last four digits of n2 are the original number n

A rubber ball keeps on bouncing back to 2/3 of the height from which it is dropped. Can you calculate the fraction of its original height that the ball will bounce after it is dropped and it has bounced four times without any hindrance ?

The doctor prescribed you to take one pill from the bottle every half an hour. The bottle is now left with only three pills.

How long do you think you have before you run out of pills?

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?

What is the next number in this series?

4,12,84,3612....

Make a sentence consisting of three words that have the whole alphabet.

Two men are in a desert. They both have packs on. One of the guys is dead. The guy alive has his pack open, and the guy who is dead has his pack closed. What is in the pack?

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