Do you know any fun or fantastic facts about the number 21?
They can be Maths facts, or cultural facts, or just very strange facts.
You might be able to make them up yourself, or you could look them up on the Internet.
We need to find 21 facts this week, so start looking.
Lets see how quickly we can add them.
Don't forget to number your interesting fact.
Fact Number One
ReplyDeleteIt is a TRIANGULAR NUMBER
1+2+3+4+5 = 21
http://www.richardphillips.org.uk/number/gl/triang.htm
The St Nics Grade 10 Maths Literacy class says:
ReplyDeleteThe object of the game Blackjack is for the player to draw cards totaling closer to 21 (without going over) than the dealer's cards.
source: www.entertainment.howstuffworks.com
My first fact is wrong!
ReplyDelete21=1+2+3+4+5+6
James in the ML class says:
ReplyDeleteWhat has 21 eyes and 6 faces but can't see
a dice
cndy msimango in the ML class says...•Gustave Whitehead allegedly flew a plane called Number 21 two years before the Wright brothers' first flight.
ReplyDeleteSAM BUTHELEZI FROM M.L CLASS SAYS: Age 21 is considered a very special moment in the life of a person/school. It is supposed to bring a sense of responsibility, along with the inspiration and motivation to achieve their goals. From birthday number 21 is considered a major milestone, which is celebrated with great enthusiasm
ReplyDeleteSneh in the ML class says:21 is the name of the game! It describes a unique version of basketball where every player plays on his own team
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ReplyDeleteZAMA MKHIZE IN THE M.L CLASS SAYS....21 USED TO BE THE AGE WHEN A PERSON COULD JOIN THE U.K OR SCOTTISH PARLIAMENT OR THE NATIONAL ASSEMBLY OF WALES
ReplyDeleteTracey in the ML class says... it is an odd number. it is not prime,its factors are 1,3,7,21.It is positive
ReplyDeletesibusi aka sibudalo in ml says;
ReplyDeleteThe sum of divisors for the integers 1 through 5 is 21.
21 is a repdigit in base 4 (111).
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ReplyDeletelungie in the ML class says....21 is the smallest number of differently sized squares needed to square the square
ReplyDeleteSlindile in the ML CLASS SAYS... it comes after 20 and before 22 interesting
ReplyDeleteSwelihle in ML class says ... The best (not highest) number of points in a game of Blackjack is 21.
ReplyDeleteRead more: http://wiki.answers.com/Q/What_are_some_facts_about_the_number_21#ixzz1CmMJQEip
thobeka in the ML class says...•21 put an end to prohibition in the U.S. It was the Twenty-First Amendment which repealed the Eighteenth Amendment, and re-legalized alcohol.
ReplyDeleteLebogang Liphuko in the M.L class say... Twenty-one is a Fibonacci number, a Harshad number, a Motzkin number, a triangular number and an octagonal number, as well as a composite number, its proper divisors being 1, 3 and 7.
ReplyDeleteIn Chemistry, 21 is the atomic number of Scandium.
ReplyDeleteslie aka kasi babes...
ReplyDeletein m.l class it says 21 is the game it descirbes a unique version of basketball where every palyer paly on his own team
Twenty One is an important age because it is the year you become an adult. Some people give you a key to show you now can come and go as you please.
ReplyDeletehello there
ReplyDelete[ Loding ]
ReplyDelete..
DeleteWhen a soldier or some military person is being buried, they shoot 21 times into the air and call it the 21 gun salute.
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