Another Maths question.

[ipoh-horfun]

solve this!!

 

[lucas111]

Re: Another Maths question.

Before 3000, after 3300.

 

[ipoh-horfun]

Re: Another Maths question.

Before 3000, after 3300.

Working ????

 

[Pinky]

Re: Another Maths question.

Haha i remember those days too well.

 

[wobbles]

Re: Another Maths question.

20% of x = y; where x = salary, and y = amount saved

Then, 20% of 1.1x = 60 + y

Where:

0.2x = y and 0.2(1.1x) = 60 + y,

Rearranging, we get:

0.2x(1.1) = 60 + y, and since 0.2x = y,

We end up with the end formula of:

1.1y = 60 + y

0.1y = 60

y = 600

And since 0.2x = 600,

x = 3000

Salary before increment (x) = $3000

Salary after increment (1.1x) = $3300

Still not enough to pay for future $800,000 3 room HDB flat

The working is provided on request for Horfun's son

 

[Charlatan]

Re: Another Maths question.

solve this!!

How old, in Singapore? Need to take into account CPF deductions

 

[wt_know]

Re: Another Maths question.

yeah ... still remember teacher said always replace what you don't know with x and y ...
now all return to teacher liao

 

[ipoh-horfun]

Re: Another Maths question.

20% of x = y; where x = salary, and y = amount saved

Then, 20% of 1.1x = 60 + y

Where:

0.2x = y and 0.2(1.1x) = 60 + y,

Rearranging, we get:

0.2x(1.1) = 60 + y, and since 0.2x = y,

We end up with the end formula of:

1.1y = 60 + y

0.1y = 60

y = 600

And since 0.2x = 600,

x = 3000

Salary before increment (x) = $3000

Salary after increment (1.1x) = $3300

Still not enough to pay for future $800,000 3 room HDB flat

The working is provided on request for Horfun's son

excuse me, are you a tuituon teacher??

 

[ktnpl]

Re: Another Maths question.

shorter version

say x=earlier salary
new savings - earlier savings = $60
=> 20% of 110% of x - 20% of x = $60
=> 0.22x - 0.2x = $60
=> 0.02x = $60
=> x = $60/0.02 = $3,000

new salary = 110% of x = $3,300

Ans: (a) $3,000; (b) $3,300

My kid in Pri 3

 

[Charlatan]

Re: Another Maths question.

Shortest: whatever the case, will take 10 years to pay for bro wobbles' new ride

 

[wobbles]

Re: Another Maths question.

That's why I say I'm glad I'm more than 1/2 way to meet my maker.... If that's what they are doing in P3, I sure fail PSLE!

 

[DrK]

Re: Another Maths question.

Why this question never factor in the deposit rate in saving bank and real rate of inflation?

What is his annualised return in 10 years if deposit rate is 1% constant and real inflation is 5%?

 

[ktnpl]

Re: Another Maths question.

That's why I say I'm glad I'm more than 1/2 way to meet my maker.... If that's what they are doing in P3, I sure fail PSLE!

True, some of the maths questions are really tough for the kids but the textbooks and curriculum are certainly more interesting than what we get in the past.

 

[Charlatan]

Re: Another Maths question.

I look at my kid's k1 Chinese and I cannot read some words Liao.

 

[ktnpl]

Re: Another Maths question.

Why this question never factor in the deposit rate in saving bank and real rate of inflation?

What is his annualised return in 10 years if deposit rate is 1% constant and real inflation is 5%?

Negative 3.3%?

Trick question right? Right answer is best not to park all of one's savings in bank deposits

 

[ipoh-horfun]

Re: Another Maths question.

I look at my kid's k1 Chinese and I cannot read some words Liao.

U need to go check with your kindergarden teacher who are mostly PRC.

 

[Charlatan]

Re: Another Maths question.

U need to go check with your kindergarden teacher who are mostly PRC.

Already did, they are prc but not sar lau prc

 

[wobbles]

Re: Another Maths question.

U need to go check with your kindergarden teacher who are mostly PRC.

Got perm armpit hair or not?

 

[detach8]

Re: Another Maths question.

got include CPF?

 

[hitmee]

Re: Another Maths question.

May i know what job is that? I wanna go apply
Good pay and increment