Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

Solve the following series:
AZ, GT, MN, __, YB

Can you decipher the following common phrase?

T M C
A U O
H S M
W T E

I cry without having a voice.
I fly without having wings.
I bite without having teeth.
I whisper without a mouth.

Who am I?

On her drawing table, Sayna lit 12 coloured candles. A few seconds later she blew two candles off.

How many candles Sayna have at the end?

If a boy blows 18 bubbles,
Then pops 6 eats 7 and then
He pops 5 and blows 1.
How many are left?

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

Make a sentence consisting of three words that have the whole alphabet.

How can you make number one disappear by adding something to it?

You have a square. What you have to do is cut and reassemble the square such that you create a Red Cross sign that has the same volume as that of the square.