Known by all without exception, Forever here, for your protection, Sometimes strong, sometimes weak, Right after the night I come - hot and chic. And while millions of miles away, I always get to you, I find my way. No life around could do without me, Can you guess what I might be?

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?

What do you answer even though it never asks you questions?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

Can you place six X (crosses) in below board without making three in a row in any way ?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

Can you complete the sequence puzzle?

AR TA GE CA LE VI LI _

Can you make four (4) nines (9) equal 100?

Place a mathematical symbol between the numerals 5 and 9 in such a way that the resulting number is greater than 5 but smaller than 9.