You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()

Can you identify if it's a murder or a suicide ?

The peacock is a bird that does not lay eggs. How do they get baby peacocks?

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.

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10

I know a nine-letter word having only one vowel.
Do you ?

What four weights can be used to balance from 1 to 30 pounds?

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

Why is a river so rich ?