If an earthquake is 1 point higher on the Richter Scale than another earthquake which is actually 10 times stronger, how much stronger would an earthquake be if it was just half a point higher on the Richter scale?

I am a three digit number.
My tens digit is five more than my ones digit.
My hundreds digit is eight less than my tens digit.
What number am I?

Using the clues below, what four numbers am I thinking of?

The sum of all the numbers is 31.
One number is odd.
The highest number minus the lowest number is 7.
If you subtract the middle two numbers, it equals two.
There are no duplicate numbers.

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

Analyze and find the missing item in the sequence:
16, 06, 68, 88, __, 98

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 ()

There was an aeroplane crash, every single person died, but two people survived. How is this possible?

A father's child, a mother's child, yet no one's son.

Who am I?

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?

Solve the puzzle by telling what does below picture means.