Count the Zeros

See how many zeros make a million, a billion, and even bigger numbers.

Put these numbers in order from smallest to biggest: 42, 4, 2, 6

42, 6, 4, 22, 4, 6, 426, 4, 42, 22, 4, 42, 6

2, 4, 6, 42

The correct order is 2, 4, 6, 42

Next Question

How many zeros does one thousand have?

1; it looks like this: 102; it looks like this: 1003; it looks like this: 1,0004; it looks like this: 10,000

3; it looks like this: 1,000

One thousand has 3 zeros: 1,000

Next Question

What number is this: 1,000,000?

One millionOne hundredOne thousandTen million

One million

That's one million! It has 6 zeros.

Next Question

Pebbles learned that one million has 6 zeros. How many more zeros must he add to make one billion?

96312

3

One billion has 9 zeros! That means that you'd have to add another 3 from the 6 in one million. One billion looks like this: 1,000,000,000

Next Question

If one thousand has three zeros, one million has six zeros, and one billion has 9 zeros, how many zeros should one trillion have?

12459

12

It has 12 zeros! It looks like this: 1,000,000,000,000

Next Question

Which number below represents three quadrillion?

300,000,0003,000,000,000,000,00030003,000,000,000

3,000,000,000,000,000

Three quadrillion has 15 zeros!

Next Question

Over eight billion humans live on Earth. How do you write eight billion in standard form?

8,000,0008008,000,000,0008,000

8,000,000,000

Eight billion has 9 zeros!

Next Question

What is the next big number after a trillion?

A quadrillionA millionA septillionA thousand

A quadrillion

A quadrillion is the next big number after a trillion.

Next Question

Which number is bigger: 20 quadrillion or 20 million?

20 million20 quadrillion

20 quadrillion

20 quadrillion is MUCH bigger than 20 million- it has 9 more zeros!

Next Question

Mr. Dolphin said 6,000,000,000,000,000,000,000 cups of water make up the world’s ocean. How would Mr. Dolphin write this number in word form?

Six thousandSix octillionSix sextillionSix million

Six sextillion

Six sextillion has 21 zeros!

Next Question

Pebbles learned that one septillion stars are in the sky. How many zeros does Pebbles need to write the number one septillion?

24211815

24

One septillion is a really huge number- it has 24 zeros!

Next Question

Mr. Dog said that 3 octillion atoms make up his body. The hiker said 7 octillion atoms make up his body. Who has more atoms to make up their body?

Mr. DogThe hiker

The hiker

7 octillion is more than 3 octillion

Next Question

A nonillion has 30 zeros while a septillion has 24 zeros. Which number is smaller?

A septillionA nonillion

A septillion

A septillion is smaller because it has less zeros!

Next Question

True or False: Infinity is a number

TrueFalse

False

Infinity is a concept, not a number!

Next Question

Which symbol can you use to represent infinity?

➕✖∞➗

∞

The symbol for infinity kind of looks like a sideways 8!

Next Question

What is the biggest number?

A googolplex4 billionThere is no biggest number1 quintillion

There is no biggest number

There is no biggest number because you could keep counting forever- that's why Pebbles learned about infinity!

Next Question

True or False: There are numbers so large you can’t even count the zeros.

TrueFalse

True

An infinity of zeros!

Next Question

Which of these numbers is the biggest?

1,000,0001,000,000,000,000,000,0001,000,000,000,0001,000

1,000,000,000,000,000,000

You can tell it's the biggest because it has the most zeros!

Next Question

True or False: Ten gajillion is a real number.

TrueFalse

False

"Gajillion" sounds like a real number, but it's just a word that means "a huge number." The word "zillion" is the same!

Next Question

What number has 100 zeros?

A googolplexOne hundred millionA googolOne zillion

A googol

A googol has 100 zeros! That's almost too bug to wrap your head around.

Finish Quiz

You've finished the quiz!

Congrats! We hope you've learned a lot.

Count the Zeros

Put these numbers in order from smallest to biggest: 42, 4, 2, 6

2, 4, 6, 42

How many zeros does one thousand have?

3; it looks like this: 1,000

What number is this: 1,000,000?

One million

Pebbles learned that one million has 6 zeros. How many more zeros must he add to make one billion?

3

If one thousand has three zeros, one million has six zeros, and one billion has 9 zeros, how many zeros should one trillion have?

12

Which number below represents three quadrillion?

3,000,000,000,000,000

Over eight billion humans live on Earth. How do you write eight billion in standard form?

8,000,000,000

What is the next big number after a trillion?

A quadrillion

Which number is bigger: 20 quadrillion or 20 million?

20 quadrillion

Mr. Dolphin said 6,000,000,000,000,000,000,000 cups of water make up the world’s ocean. How would Mr. Dolphin write this number in word form?

Six sextillion

Pebbles learned that one septillion stars are in the sky. How many zeros does Pebbles need to write the number one septillion?

24

Mr. Dog said that 3 octillion atoms make up his body. The hiker said 7 octillion atoms make up his body. Who has more atoms to make up their body?

The hiker

A nonillion has 30 zeros while a septillion has 24 zeros. Which number is smaller?

A septillion

True or False: Infinity is a number

False

Which symbol can you use to represent infinity?

∞

What is the biggest number?

There is no biggest number

True or False: There are numbers so large you can’t even count the zeros.

True

Which of these numbers is the biggest?

1,000,000,000,000,000,000

True or False: Ten gajillion is a real number.

False

What number has 100 zeros?

A googol

You've finished the quiz!

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