[General] Chit Chat Corner

[lunloon]

(x² - 81x - 186) cos [(π/2) - 90°] = 0

 

(x² - 81x - 186) cos [(180°/2) - 90°] = 0

 

(x² - 81x - 186) cos (90° - 90°) = 0

 

(x² - 81x - 186) cos 0° = 0

 

(x² - 81x - 186) (1) = 0

 

x² - 81x - 186 = 0

 

(x - 83) (x + 2) = 0

 

therefore x = 83 or x = -2

 

since it is given that x is > 0, x = 83

 

 

Your Sec 3 Maths fail.

 

83 x 2 = 166.

 

x should be 83.235.

[Magg]

Your Sec 3 Maths fail.

 

83 x 2 = 166.

 

x should be 83.235.

 

HAHAHA lun, way to go. That's a sharp eye

 

Vidak. 一针见血

[Kevs]

haha.. relax... i nr learnt A maths my sec skool also.. come to poly, almost die.. The maths alone can give me stress liao...

 

what dip you doing kev?

 

skinny dipping...

 

no la, dip in building svcs.

 

Your Sec 3 Maths fail.

 

83 x 2 = 166.

 

x should be 83.235.

 

HAHAHA lun, way to go. That's a sharp eye

 

Vidak. 一针见血

 

oops...

[VidaK]

Haha this is the way I would have done it. The cos part is a constant so there's no need to reduce it down.

 

but still... you didn't do it...

 

Your Sec 3 Maths fail.

 

83 x 2 = 166.

 

x should be 83.235.

 

ha dun worry about my maths... now I know who put in some effort to solve it

[lunloon]

ha dun worry about my maths... now I know who put in some effort to solve it

 

Got equations must solve. Helps to keep the mind fresh.

 

Better yours than the ones on my desk.

[lunloon]

Not sure if anyone is interested in some maths,

 

this is hearsay this year's PSLE question.

 

Jim bought some chocolates and gave half of it to Ken. Ken bought some sweets and gave half of it to Jim. Jim ate 12 sweets and Ken ate 18 chocolates. The ratio of Jim’s sweets to chocolates became 1:7 and the ratio of Ken’s sweets to chocolates became 1:4. How many sweets did Ken buy?

[VidaK]

Got equations must solve. Helps to keep the mind fresh.

 

Better yours than the ones on my desk.

 

 

Not sure if anyone is interested in some maths,

 

this is hearsay this year's PSLE question.

 

Jim bought some chocolates and gave half of it to Ken. Ken bought some sweets and gave half of it to Jim. Jim ate 12 sweets and Ken ate 18 chocolates. The ratio of Jim’s sweets to chocolates became 1:7 and the ratio of Ken’s sweets to chocolates became 1:4. How many sweets did Ken buy?

 

let S be sweets and C be chocolates

 

Jim's current balance is

 

7(S/2 - 12) = C/2 >>>(1)

 

Ken's current balance is

 

(C/2-18) = 2S

 

C/2 = 2S + 18

 

C = 4S + 36 >>>(2)

 

 

 

putting (2) into (1):

 

7S/2 - 84 = 2S +18

 

7S - 168 = 4S + 36

 

3S = 204

 

S = 68

 

Ken bought 68 sweets

[thenation]

Haha vidak. You're using simultaneous equations to solve a PSLE question...try to use what they know at that time to solve haha.

[VidaK]

Haha vidak. You're using simultaneous equations to solve a PSLE question...try to use what they know at that time to solve haha.

 

to rephrase it for primary school level, instead of using " = ", I could use " : " ratio... ratio is taught in primary 3, so is algebra

[lunloon]

Haha vidak. You're using simultaneous equations to solve a PSLE question...try to use what they know at that time to solve haha.

 

to rephrase it for primary school level, instead of using " = ", I could use " : " ratio... ratio is taught in primary 3, so is algebra

 

We (me and a few friends) have thought about it.

 

It has to be simultaneous. Simple ratio doesn't provide solutions, simply because you have ratio, but you also have sums.

 

Trial and error will not work well here.

[VidaK]

We (me and a few friends) have thought about it.

 

It has to be simultaneous. Simple ratio doesn't provide solutions, simply because you have ratio, but you also have sums.

 

Trial and error will not work well here.

 

ha... either way it is a brilliant question to separate the A* students from the A students

[lunloon]

ha... either way it is a brilliant question to separate the A* students from the A students

 

Although it has been a long time ago, I didn't think I had done this in PSLE.

[VidaK]

Although it has been a long time ago, I didn't think I had done this in PSLE.

 

neither did I... but as time passes it is normal for higher learning to transcend to younger minds... maths today is far harder than that 20 years ago... if there is no maths "inflation", our technological frontier would remain stagnant...

[Tanarthur]

 

http://wfn.typepad.com/.a/6a0105364cdc73970c011168a6a02a970c-800wi

(the boxer term i mean. )

 

 

Ah girl is going to love it!!!

 

Hamster is going to hate me!!!!

 

Stirring something here....

[Tanarthur]

old man,

I'll take over your previous title of "road hogger" for now.

 

Man, I just cannot stand those taxi and vans middle finger me for moving too slow along left most lane. How do you swallow that? Care to gimme some tips.

 

Cheers!

 

This one my title..I dont mind riding slow.

 

Dont bother about those behind. But keep a note of their distance behind you. You ride at your own pace and comfort. Then only will you enjoy the ride.

 

Warren, no matter how fast I go, I still lose to a Ducati Monster, a Boldor and a Fino with sports rim.

 

Btw, I not coming into this thread until those bugger finished with their Maths or Theory or whatever. I dont understand what they trying to proof... I find it very irritating. Suppose to be Chit Chat becomes like war. A simple term of "I travelling at 83km/h in KPE is ok and I dont know what happened to the female rider who was faster than me?" Fyi, 83 on a TA is about 73 on other bikes unless you done the modification.

[VidaK]

This one my title..I dont mind riding slow.

 

Dont bother about those behind. But keep a note of their distance behind you. You ride at your own pace and comfort. Then only will you enjoy the ride.

 

Warren, no matter how fast I go, I still lose to a Ducati Monster, a Boldor and a Fino with sports rim.

 

Btw, I not coming into this thread until those bugger finished with their Maths or Theory or whatever. I dont understand what they trying to proof... I find it very irritating. Suppose to be Chit Chat becomes like war. A simple term of "I travelling at 83km/h in KPE is ok and I dont know what happened to the female rider who was faster than me?" Fyi, 83 on a TA is about 73 on other bikes unless you done the modification.

 

okok... no more maths... dun want to be a bugger...

 

my meter would read 92km/h before I recalculate the actual speed...

[mepkoh]

 

 

 

Jim bought some chocolates and gave half of it to Ken. Ken bought some sweets and gave half of it to Jim. Jim ate 12 sweets and Ken ate 18 chocolates. The ratio of Jim’s sweets to chocolates became 1:7 and the ratio of Ken’s sweets to chocolates became 1:4. How many sweets did Ken buy?

 

let S be sweets and C be chocolates

 

Jim's current balance is

 

7(S/2 - 12) = C/2 >>>(1)

 

Ken's current balance is

 

(C/2-18) = 2S

 

C/2 = 2S + 18

 

C = 4S + 36 >>>(2)

 

 

 

putting (2) into (1):

 

7S/2 - 84 = 2S +18

 

7S - 168 = 4S + 36

 

3S = 204

 

S = 68

 

Ken bought 68 sweets

 

no wonder my timestable couldnt solve it...

wow..it takes an undergraduate majoring in everything to get answer..

 

anyway...marvelous solution u have there...

[VidaK]

no wonder my timestable couldnt solve it...

wow..it takes an undergraduate majoring in everything to get answer..

 

anyway...marvelous solution u have there...

 

thanks... but once again its meant for pri 6... not my current level...

[VidaK]

any phantom riders got rammed by my friend riding a nsr today...?

 

and... pfffttt I can't get a insurance quote from ntuc online... anyone have any idea why...?

[hamsterwhale]

any phantom riders got rammed by my friend riding a nsr today...?

 

and... pfffttt I can't get a insurance quote from ntuc online... anyone have any idea why...?

 

lynn ram some1???

[kmax]

lynn rammed vidak from behind? sounds something wrong

[Magg]

lynn rammed vidak from behind? sounds something wrong

 

 

[Kevs]

This one my title..I dont mind riding slow.

 

Dont bother about those behind. But keep a note of their distance behind you. You ride at your own pace and comfort. Then only will you enjoy the ride.

 

Warren, no matter how fast I go, I still lose to a Ducati Monster, a Boldor and a Fino with sports rim.

 

Btw, I not coming into this thread until those bugger finished with their Maths or Theory or whatever. I dont understand what they trying to proof... I find it very irritating. Suppose to be Chit Chat becomes like war. A simple term of "I travelling at 83km/h in KPE is ok and I dont know what happened to the female rider who was faster than me?" Fyi, 83 on a TA is about 73 on other bikes unless you done the modification.

 

boss, pruss 1 on the fcukin mathematics-crap.

can i ride beside u instead? my one oso cannot even clear meter, needle spring spoil, always stuck @ 20 mph...

 

lynn ram some1???

 

lynn rammed vidak from behind? sounds something wrong

 

 

 

omg...

hope vidak's rear alrite...

[vincekam]

old man,

Why bother about fast or slow on each of their own bike huh.

little bit only you get heat on your neck say don't come here and don't come there.

 

Let the boyz have fun with donno what numbers math okie. It's just good clean fun if you read it from another angle.

 

Seems like age is catching up on you.

Come, we go lar kopi shake leg and drink chinese tea :-)

 

Cheers!

This one my title..I dont mind riding slow.

 

Dont bother about those behind. But keep a note of their distance behind you. You ride at your own pace and comfort. Then only will you enjoy the ride.

 

Warren, no matter how fast I go, I still lose to a Ducati Monster, a Boldor and a Fino with sports rim.

 

Btw, I not coming into this thread until those bugger finished with their Maths or Theory or whatever. I dont understand what they trying to proof... I find it very irritating. Suppose to be Chit Chat becomes like war. A simple term of "I travelling at 83km/h in KPE is ok and I dont know what happened to the female rider who was faster than me?" Fyi, 83 on a TA is about 73 on other bikes unless you done the modification.

[Kevs]

old man,

Why bother about fast or slow on each of their own bike huh.

little bit only you get heat on your neck say don't come here and don't come there.

 

Let the boyz have fun with donno what numbers math okie. It's just good clean fun if you read it from another angle.

 

Seems like age is catching up on you.

Come, we go lar kopi shake leg and drink chinese tea :-)

 

Cheers!

 

lauda, can i pruss 1?