If one and a half boys, eat one and a half burgers in one and a half hours.

How many burgers can 9 boys eat in 3 hours?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

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 ?

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

How could a baby fall out of a twenty-story building onto the ground and live?

Why is the longest human nose just 11 inches?

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

In one of the popular batman series movie "Batman Forever", there was a riddle that goes like "Tear me off and then scratch my head and I was red then and now I am back. Who am I?