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100

What blood type is the most common?

What is O Positive

100

What two primary colors make the color green?

What is blue and yellow.

100

Who was the first woman to fly solo across the Atlantic Ocean?

Who is Amelia Earhart.

100

What substance are nails made out of?

What is keratin.

100

How many signs are there in the zodiac?

What is 12.

200

Who was the first American astronaut to set foot on the moon?

Who is Neil Armstrong

200

What is CO2 referred to as?

What is Carbon Dioxide

200

What blood type qualifies as a universal donor?

What is O negative.

200

Babies have more what than adults?

What is bones.

200

Research suggests that there's a possibility that human beings with this certain feature may be related. 

What is blue eyes.

300

On which continent is Timbuktu located?

What is Africa

300

What is the largest desert in the world?

What is The Sahara.

300

Which painter is reputable for cutting off his own ear?

Who is Vincent Van Gogh.

300

What is the capitol of Turkey?

What is Istanbul

300

How many years must pass before you can celebrate as a centennial?

What is 100.

400

What is cynophobia?

What is the fear of dogs.

400

The wooly mammoth is most similar to what modern day animal?

What is the elephant.

400

Who painted the ceiling in the Sistine Chapel?

Who is Michaelangelo.

400

What building toy company was known as "Automatic Binding Blocks" before it's current name?

What is LEGO.

400

What is the loudest animal on Earth?

What is the Sperm Whale.

500

What is the hardest substance in the human body?

What is tooth enamel.

500

What is a group of crows called?

What is a murder.

500

Which bone are babies born without?

What is kneecaps.

500

What language is the most popular language spoken worldwide?

What is English.

500

What is the plastic end of a shoelace called?

What is aglet.

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