New Posts For Thread: Is this how they teach maths today?https://community.betfair.com/general_betting/go/thread/view/94082/23518918/is-this-how-they-teach-maths-todayFrom this week's Sunday Times;"Primary school maths teachers are failing to attain the standard of arithmetic expected of 11-year olds, new research has claimed".They went on to ask a few straight forward questions, and this one caused the most problI was taught that 2 is the first prime because, for reasons I've forgotten, 1 isn't a prime.https://community.betfair.com/general_betting/go/thread/view/94082/23518918/is-this-how-they-teach-maths-today?post_id=420276566#420276566I was taught that 2 is the first prime because, for reasons I've forgotten, 1 isn't a prime.Sat, 20 Feb 2010 10:48:14 -0600Moonshiner 20 Feb 13:11[...]Anything divided by 0 is considered Not Defined (this is not the same as infinity) - as another poster pointed out, it is an illegal operation.[...]It is considered undefined because accepting the answer infinity leadhttps://community.betfair.com/general_betting/go/thread/view/94082/23518918/is-this-how-they-teach-maths-today?post_id=420276562#420276562Moonshiner 20 Feb 13:11[...]Anything divided by 0 is considered Not Defined (this is not the same as infinity) - as another poster pointed out, it is an illegal operation.[...]It is considered undefined because accepting the answer infinity leadSat, 20 Feb 2010 10:06:03 -0600correct moonshiner, the post from investor after was basically restating the argument in far fewer lines, but the division by 0 was a little more in your face thenwhy is the first prime number question tricky? i can only guess that some people like thttps://community.betfair.com/general_betting/go/thread/view/94082/23518918/is-this-how-they-teach-maths-today?post_id=420276558#420276558correct moonshiner, the post from investor after was basically restating the argument in far fewer lines, but the division by 0 was a little more in your face thenwhy is the first prime number question tricky? i can only guess that some people like tSat, 20 Feb 2010 08:50:47 -0600Eldrick:Then x+y = y [cancelled (x-y) both sides]Implicitly this is dividing by (x-y) but as you've stated that x=y then this is tantamount to dividing by 0 - which is not allowed. Anything divided by 0 is considered Not Defined (this is not the samehttps://community.betfair.com/general_betting/go/thread/view/94082/23518918/is-this-how-they-teach-maths-today?post_id=420276554#420276554Eldrick:Then x+y = y [cancelled (x-y) both sides]Implicitly this is dividing by (x-y) but as you've stated that x=y then this is tantamount to dividing by 0 - which is not allowed. Anything divided by 0 is considered Not Defined (this is not the sameSat, 20 Feb 2010 06:11:50 -0600Eldrick:Then x+y = y [cancelled (x-y) both sides]Implicitly this is dividing by (x-y) but as you've stated that x=y then this is tantamount to dividing by 0 - which is not allowed. Anything divided by 0 is considered Not Defined (this is not the samehttps://community.betfair.com/general_betting/go/thread/view/94082/23518918/is-this-how-they-teach-maths-today?post_id=420276550#420276550Eldrick:Then x+y = y [cancelled (x-y) both sides]Implicitly this is dividing by (x-y) but as you've stated that x=y then this is tantamount to dividing by 0 - which is not allowed. Anything divided by 0 is considered Not Defined (this is not the sameSat, 20 Feb 2010 06:11:33 -0600i solved it without calc... its 22https://community.betfair.com/general_betting/go/thread/view/94082/23518918/is-this-how-they-teach-maths-today?post_id=420276546#420276546i solved it without calc... its 22Fri, 19 Feb 2010 12:25:36 -0600Proof that women are evilWomen require time and moneyWomen = Time x Moneyand we know that time is money, so Time = Money...Women = Money x Money = Money^2And we know that money is the root of all evilMoney = Sqrt (evil)ThereforeWomen = (Sqrt(evil^2))https://community.betfair.com/general_betting/go/thread/view/94082/23518918/is-this-how-they-teach-maths-today?post_id=420276542#420276542Proof that women are evilWomen require time and moneyWomen = Time x Moneyand we know that time is money, so Time = Money...Women = Money x Money = Money^2And we know that money is the root of all evilMoney = Sqrt (evil)ThereforeWomen = (Sqrt(evil^2))Fri, 19 Feb 2010 12:18:04 -0600a=0b=1c=2a*b = a*cb=chttps://community.betfair.com/general_betting/go/thread/view/94082/23518918/is-this-how-they-teach-maths-today?post_id=420276538#420276538a=0b=1c=2a*b = a*cb=cFri, 19 Feb 2010 12:08:32 -0600Let x=yThen x^2 = xy [multiplied by x both sides]Then x^2-y^2 = xy-y^2 [subtracted y^2 both sides]Then (x+y)(x-y) = y(x-y) [factored each side]Then x+y = y [cancelled (x-y) both sides]Then x+x = x [substitute x in for y]Then 2 = 1 [divide both sideshttps://community.betfair.com/general_betting/go/thread/view/94082/23518918/is-this-how-they-teach-maths-today?post_id=420276534#420276534Let x=yThen x^2 = xy [multiplied by x both sides]Then x^2-y^2 = xy-y^2 [subtracted y^2 both sides]Then (x+y)(x-y) = y(x-y) [factored each side]Then x+y = y [cancelled (x-y) both sides]Then x+x = x [substitute x in for y]Then 2 = 1 [divide both sidesFri, 19 Feb 2010 11:20:03 -0600tracy is a cross dresser .https://community.betfair.com/general_betting/go/thread/view/94082/23518918/is-this-how-they-teach-maths-today?post_id=420276530#420276530tracy is a cross dresser .Fri, 19 Feb 2010 11:11:09 -0600