Names
Countries
Letters
What Number?
Time
100

What was zero originally called?

Cipher comes from the Arabic word sifr meaning "empty". The first known use of the word zero was in 1598.

100

Who Were The First People To Ever Use Negative Numbers?

Chinese

Negative numbers were initially used to figure out the amount of someone's debt.

100

Every Odd Number Has What Letter In It?

e

The letter E is a pretty common vowel, so it's not odd that it's present in every odd number. What is odd is that it's not in every even number as well.

100

How Many Moves Does It Take To Solve A Rubik's Cube?

No more than 20 moves

It took over 30 years for anyone to figure out that any Rubik's Cube can be solved in 20 moves and there are 43 quintillion possible configurations of the Cube.

100

 When Is Pi Day Celebrated?

March 14

It is a day to celebrate the mathematical constant pi ( 3.14) and to eat lots of pie!

200

What Type Of Number Has No Factors Other Than 1 And Itself?

Prime number

200

 In Israel, Instead Of "+", They Use What?

inverted "T"

200

 What Is The First Number To Contain The Letter 'A'?

One thousand

Many other English speaking countries would argue that the first number with the letter 'a' is 101, due to the fact that it's said "one hundred And one".

200

What Number Is An Improper Fraction Always Greater Than?

One

200

 Most Of The Mathematical Notation In Use Today Was Not Invented Until When?

The 16th century

Before the 16th century, mathematics was written out in words, making mathematical discovery very difficult.

300

What Do You Call An Angle More Than 90 Degrees And Less Than 180 Degrees?

Obtuse Angle

300

Where Were The Arabic Numerals Invented?

India

What's interesting is that the English numbers used today are actually Arabic numerals from centuries ago.

300

 What Is The Only Number To Have Its Letters In Alphabetical Order?

Forty

While the number 'one' is the only number in which the letters are in reverse alphabetical order.

300

How Many Digits Of Pi Are There?

Infinite amount

The record for finding consecutive numbers, from 3.14 onward to the final digit, is held by Fabrice Bellard, who announced that he had calculated pi to 2.7 trillion digits.

300

What Unit Of Time Is 1/100th Of A Second?

Jiffy

Now you know why people use the phrase "in a jiffy" to refer to doing something very quickly.

400

What Is The Math Term Described As The Likelihood That Something Will Happen?

Probability

400

The Most Notable Achievement Of Islamic Mathematics Was The Development Of What?

Algebra

400

What Number Comes First If All Numbers Are Arranged Alphabetically?

8

The letter 'E' is a pretty popular letter among the numbers. It's present in most numbers and makes the number 8 come first alphabetically. Also, 0 would come last when arranged in alphabetical order.

400

 What Are The First Four Digits Of Pi?

3.141

400

What is the fastest someone has ever counted to one billion?

89 days, Jeremy Harper streamed his attempt in 2007

500

What Common Math Term Means "For Every One Hundred" In Latin?

Percent

500

 In Chinese And Japanese Cultures, The Number 4 Is Associated With What?

Death

Number 4 is considered unlucky because it sounds close to the Chinese word meaning death. In China, you can find several buildings without a 13th and 4th floor because of how unlucky these numbers are.

500

What Is The Only Number That Has The Same Number Of Letters?

Four

500

What Number Is The Only Even Prime Number?

2

500

Markings On Animal Bones Indicate That Humans Have Been Doing Math Since When?

30,000 BC

This animal bone is called the Ishango Bone and has Tally marks carved along it.

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