Your last good ping-pong ball fell into a narrow metal pipe embedded one foot deep in concrete.
How can you get it out undamaged, if all the tools you have are your tennis paddle, shoe laces, and plastic water bottle, which does not fit into the pipe?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

What are the 50th, 63rd and 100th numbers in the sequence below?
4, 5, 8, 8, 9, 9, 12, 13, 13, 13, 17, 18, ...

What is the largest number you can write with just 3 digits?

There are four 3-link chains. All you have to do is join them into a big 12-link chain. For joining two closed links, one of the links must be cut and placed onto the other link for closing.

How many minimum links will you have to cut to make the big chain?

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

What goes through cities and fields, but never moves?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?

The doctor advised his patient to take a tablet after every fifteen minutes. He gave him five tablets in total.

How much time will he take to have all the five tablets?

They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.