As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

In the picture, you can see a chess board. On the top left position, the K marks a knight. Now, can you move the knight in a manner that after 63 moves, the knight has been placed at all the squares exactly once excluding the starting square?

When we see 2 but call 10?

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

What month of the year has 28 days?

Can you replace the question mark with the correct number?

Count the number of lines in the image below ?

A man died, leaving $10,000,000 for his widow, 5 sons and 4 daughters. Each daughter received an equal amount, each son received twice as much as a daughter, and the widow received three times as much as a son.

How much did the widow receive?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?