Can you decipher the following common phrase?

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

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

Can you find out what is missing?

1 3 5
2 4 ?

Hint: It's not six. Think out of the box.

I have teeth but i don't bite. Who Am I ?

I am sure no one can have two things for dinner. what are they?

Can you find out the remainder when 3^300 is divided by 5?

Alex opened 24 presents
Jonah opened 8 presents
Clara opened 1 present

Can you find out how many presents were opened by Candy?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

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,
29 - 1 = 30
9 - 1 = 10
14 - 1 = 15

Based on similar logic, Can you prove that the below algebraic equation is true?
11 - 1 = 10 ?