Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

Replace the question mark with the correct number below.

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

What kind of band never plays music?

A man wants to cross the pit of fire which is 25 feet in length and he has 2 planks(fire resistant) 19 feet in length. How can he cross the pit of fire alive?

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

What does this rebus puzzle means ?

Can you find the odd number in the following five choices?

1) 482636
2) 259807
3) 865195
4) 104739
5) 391744

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?