Math
Science
English
History
Miscillaneous
100

I am a number but when you add the letter G to me I go away, what number am I?

1 (gONE) 

100

More than 75% of the earths surface is covered in this. What is it?

Air 

100

What kind of fruit never wants to be alone?

A pear

100

This country is located north of south korea?

North Korea

100

Name a big number.

Any number greater than 1 billion

200

What is heavier? A ton of feathers or a ton of bricks?

They are both heavy, they both equal a ton.

200

What animal can hold its breath underwater the longest?

A fish

200

What kind of cup does not hold water?

A cupcake

200

During what decade was the first computer designed?

1822

200

The protagonist of this movie has to hide his powers among those that have none. 

Harry Potter

300

If two's a company, and three is a crowd, what is four and five?

Nine.

300

What is the laziest organ in the human body?

The Brain

300

I appear twice in the morning and twice in the evening. But I only appear once at night. What am I? 

The letter "N" 

300

Which bus could cross the ocean?

Columbus

300

Roll a d20

1-10 Success

11-20 Fail

400

How many times can you subtract 5 from 25?

Once, after you subtract 5 from 25 it becomes 20 and you are no longer subtracting from 25.

400

What is the powerhouse of the cell?

The Mitochondria

400

Mr. Bowser has four daughters and each of those daughters has one brother. How many children does Mr. Bowser has?

Five children, the sisters share the same brother. 

400

It can be repeated but rarely in the same way. It can't be changed but can be rewritten. It can be passed down, but should not be forgotten. What am I?

History

400

Spell:

Hippopotamus 

500

If you toss a coin 10 times and it lands heads every time, what are the chances it will land on heads if you toss it again?

50/50 chance, the previous toss does not affect the chances of the next toss. 

500

While some people are born without this, they tend to cut it for hygiene reasons. What is it?

Hair

500

What country could be used to answer how you feel and what kind of car do you drive?

Madagascar

500

I am killer of trees but people need me. I can be blown away by a breeze and I have been here since ancient Greece. What am I?

Paper

500

What's my favorite ice cream?

Cookie Dough Vanilla Ice Cream