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?

If "P" means "-", "Q" means "/", "R" means "+", and "S" means "*" then find the value of the following:

21 Q 7 R 9 S 10 P 13

These types of puzzles are known as charades. What you have to do is to find two words that are referred to in the first stanza and the second stanza and put them together to form the third word in the third stanza.

Just for example, if my first refers to 'off' and my second refers to 'ice', then my whole will be the 'office'.

My first is present - future's past -
A time in which your lot is cast.

My second is my first of space
Defining people's present place.

My whole describes a lack of site -
A place without length, breadth, or height.

If one and a half boys, eat one and a half burgers in one and a half hours.

How many burgers can 9 boys eat in 3 hours?

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

What jumps when it walks and sits when it stands?

Can you decipher the below rebus?

PBLUESAISNUERSES

Give it food and it will live; give it water and it will die.

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

Find the next number in the sequence

1, 2, 6, 21, 88, __?