What happened when the wheel was invented?

How do you go from 98 to 720 using just one letter?

It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

Rearrange the letters in "new door" to make one word.

Find the number of squares in the below picture

Take away the whole and some still remain. What is it?

Count the Triangle in the figure given below:

I have feet, but no legs. Which animal Am I?

A number can be multiplied by multiple of nine
i.e 9 18 27 36 45 ...

and the resulting number consist of only one digit.

Can you identify the number ?

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?