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?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

I have thought of a number that is made up by using all the ten digits just once. Here are a few clues for you to guess my number:

First digits is divisible by 1.
First two digits are divisible by 2.
First three digits are divisible by 3.
First four digits are divisible by 4.
First five digits are divisible by 5.
First six digits are divisible by 6.
First seven digits are divisible by 7.
First eight digits are divisible by 8.
First nine digits are divisible by 9.
The number is divisible by 10.

Can you find out the number ?

I’m orange, I wear a green hat and I sound like a parrot. What am I?

Which number comes next in the number series?

2, 9, 30, 93, ?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

There is so small cabin inside a deep forest.
All the forest burned out to worst possible but the inside of the cabin is still the same.
However all the person inside the cabin die.

How come ?

using four eights (8) and a one (1) and one mathematical symbol , create the number 100