If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

Prove that twice of ten is the same as twice of eleven.

A girl says this to her best friend: “I was born in 1955, and I celebrated my 17th birthday last weekend.” Her best friend thinks she’s lying, but she’s actually correct. How is that possible?

In order to complete the racing competition, the Mexico racetrack has to submit its top and the most famous three horses to win the competition. Due to an electrical storm, all the records are cleared and no one knows which horse holds the record. They all look identical and it becomes even more difficult to differentiate the horses. There are 25 horses in the Mexico racetrack. But there can be only five horses at a time on the track. What will the least number of races that can be conducted to find out the three fastest horses?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

Can you find out who is the kidnapper in below Picture and why, Explain ?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

A four-digit number (not beginning with 0) can be represented by ABCD. There is one number such that ABCD=A^B*C^D, where A^B means A raised to the B power. Can you find it?

There is a square piece of paper with a hole that is denoted by the circle on the top right side in the given picture. You have to cut the paper in a manner that it forms two and only two separate pieces of paper and then rearrange the pieces in a manner that the holes come in the centre of the paper.