# Interesting Facts about Maths!

• The word “mathematics” comes from the Greek máthēma, which means learning, study, science.
• What comes after a million, billion and trillion? A quadrillion, quintillion, sextillion, septillion, octillion, nonillion, decillion and undecillion.
• Different names for the number 0 include zero, nought, naught, nil, zilch and zip.
• Zero ( 0 ) is the only number which can not be represented by Roman numerals.
• Do you know the magic of no. nine (9)? Multiply any number with nine (9 ) and then sum all individual digits of the result (product) to make it single digit, the sum of all these individual digits would always be nine (9).
• Here is an interesting trick to check divisibility of any number by number 3.A number is divisible by three if the sum of its digits is divisible by three (3).
• The = sign (“equals sign”) was invented by 16th Century Welsh mathematician Robert Recorde, who was fed up with writing “is equal to” in his equations.
• Googol (meaning & origin of Google brand ) is the term used for a number 1 followed by 100 zeros and that it was used by a nine-year old, Milton Sirotta, in 1940.
• The name of the popular search engine ‘Google’ came from a misspelling of the word ‘googol’.
• Abacus is considered the origin of the calculator.
• Have you ever noticed that the opposite sides a die always add up to seven (7).
• Equal sign (=) was first used in 1557 by Robert Recorde, an Englishman.
• 12,345,678,987,654,321 is the product of 111,111,111 x 111,111,111. Notice the sequence of the numbers 1 to 9 and back to 1.
• Plus (+) and Minus (-) sign symbols were used as early as 1489 A.D.
• An icosagon is a shape with 20 sides.
• Trigonometry is the study of the relationship between the angles of triangles and their sides.
• If you add up the numbers 1-100 consecutively (1+2+3+4+5…) the total is 5050.
• 2 and 5 are the only primes that end in 2 or 5.
• From 0 to 1,000, the letter “A” only appears in 1,000 (“one thousand”).
• A ‘jiffy’ is an actual unit of time for 1/100th of a second.
• ‘FOUR’ is the only number in the English language that is spelt with the same number of letters as the number itself
• 40 when written “forty” is the only number with letters in alphabetical order, while “one” is the only one with letters in reverse order.
• In a group of 23 people, at least two have the same birthday with the probability greater than 1/2 .
• If there are 50 students in a class then it’s virtually certain that two will share the same birthday..
• Among all shapes with the same perimeter a circle has the largest area.
• Among all shapes with the same area circle has the shortest perimeter .
• In 1995 in Taipei, citizens were allowed to remove ‘4’ from street numbers because it sounded like ‘death’ in Chinese. Many Chinese hospitals do not have a 4th floor. Forward it...