Q&A - P5 Math

[tianzhu]

zico:

Thanks in advance to anyone who can help.


--------------------

Leela and Kumar shared a sum of money. Leela's share was $90 less than Kumar's. After Kumar gave 1/7 of his share to Leela, Leela had $10 more than Kumar.

(a) how much did Leela have at first?

(b) What was the sum of money?

Hi

You may work with MD or units.

Start with Kumar ------ 7 units.

After Kumar gave 1/7 or 1 unit to Leela, Leela had $10 more than Kumar.

Kumar ------- 6 units
Leela -------- 6 units + 10

Before Leela receive 1 unit from Kumar, she had (5 units + 10)

Leela's share was $90 less than Kumar's.

5 units + 10 + 90 -------- 7 units

2 units -------- 100
1 unit ------- 50

Leela --------- (5*50 + 10) -------260

Kumar ------- 350

The sum of money -------- 260 + 350 -------- 610

Best wishes

[zico]

Wow... thanks thanks !


:lovesite:

[savoury sweet]

Hi, can anyone help me with this question? Thks


Lily would like to cut out as many isosceles triangles of the same shape and size from a rectangular piece of paper shown length 29cm and breath 14cm. Each isosceles triangle should have a base of 6cm and a height of 4 cm. What is the maximum number of isosceles triangles she can cut ?

My apologies, I could not draw the intended rectangle and isosceles triangle.

[MathIzzzFun]

savoury sweet:

Hi, can anyone help me with this question? Thks


Lily would like to cut out as many isosceles triangles of the same shape and size from a rectangular piece of paper shown length 29cm and breath 14cm. Each isosceles triangle should have a base of 6cm and a height of 4 cm. What is the maximum number of isosceles triangles she can cut ?

My apologies, I could not draw the intended rectangle and isosceles triangle.

Hi

May I know the source of this question ? What is the given answer ?
Personally, I think this question is beyond the scope of P5/P6. It is more likely a MO question.

My answer is 28

cheers.

[savoury sweet]

MathIzzzFun:

savoury sweet:

Hi, can anyone help me with this question? Thks


Lily would like to cut out as many isosceles triangles of the same shape and size from a rectangular piece of paper shown length 29cm and breath 14cm. Each isosceles triangle should have a base of 6cm and a height of 4 cm. What is the maximum number of isosceles triangles she can cut ?

My apologies, I could not draw the intended rectangle and isosceles triangle.

Hi

May I know the source of this question ? What is the given answer ?
Personally, I think this question is beyond the scope of P5/P6. It is more likely a MO question.

My answer is 28

cheers.

Hi MathIzzzfun,

That was my gal's SA1 maths question. The ans is 24. The workout given as 4 x 3 x 2 = 24. I don't get the \" x 2\" part ??

[tianzhu]

savoury sweet:

Hi, can anyone help me with this question? Thks


Lily would like to cut out as many isosceles triangles of the same shape and size from a rectangular piece of paper shown length 29cm and breath 14cm. Each isosceles triangle should have a base of 6cm and a height of 4 cm. What is the maximum number of isosceles triangles she can cut ?

My apologies, I could not draw the intended rectangle and isosceles triangle.

Hi

Hope this helps.

Best wishes

http://farm8.staticflickr.com/7237/7201423944_6d5baf659b_z.jpg\">

[MathIzzzFun]

savoury sweet:

MathIzzzFun:

[quote=\"savoury sweet\"]Hi, can anyone help me with this question? Thks


Lily would like to cut out as many isosceles triangles of the same shape and size from a rectangular piece of paper shown length 29cm and breath 14cm. Each isosceles triangle should have a base of 6cm and a height of 4 cm. What is the maximum number of isosceles triangles she can cut ?

My apologies, I could not draw the intended rectangle and isosceles triangle.

Hi

May I know the source of this question ? What is the given answer ?
Personally, I think this question is beyond the scope of P5/P6. It is more likely a MO question.

My answer is 28

cheers.

Hi MathIzzzfun,

That was my gal's SA1 maths question. The ans is 24. The workout given as 4 x 3 x 2 = 24. I don't get the \" x 2\" part ??[/quote]Hi

I have attached the solution to obtain 28 triangles. To get this, one needs to know pythagorus theorem and similar triangles.

http://i49.tinypic.com/2dccy2c.png\">

cheers.

[Nebbermind]

MathIzzzFun:

I have attached the solution to obtain 28 triangles. To get this, one needs to know pythagorus theorem and similar triangles.

http://i49.tinypic.com/2dccy2c.png\">

cheers.

:udaman:

[savoury sweet]

Hi


May I know the source of this question ? What is the given answer ?
Personally, I think this question is beyond the scope of P5/P6. It is more likely a MO question.

My answer is 28

cheers.[/quote]


Hi MathIzzzfun,

That was my gal's SA1 maths question. The ans is 24. The workout given as 4 x 3 x 2 = 24. I don't get the \" x 2\" part ??[/quote]

Hi

I have attached the solution to obtain 28 triangles. To get this, one needs to know pythagorus theorem and similar triangles.

http://i49.tinypic.com/2dccy2c.png\">

cheers.[/quote]


Thank you so much MathIzzzfun

[MathIzzzFun]

savoury sweet:

Hi


May I know the source of this question ? What is the given answer ?
Personally, I think this question is beyond the scope of P5/P6. It is more likely a MO question.

My answer is 28

cheers.


Hi MathIzzzfun,

That was my gal's SA1 maths question. The ans is 24. The workout given as 4 x 3 x 2 = 24. I don't get the \" x 2\" part ??

Hi

I have attached the solution to obtain 28 triangles. To get this, one needs to know pythagorus theorem and similar triangles.

http://i49.tinypic.com/2dccy2c.png\">

cheers.


Thank you so much MathIzzzfun

u r welcome. The question was not set properly, and certainly 24 triangles cannot be the answer.

I just realized that using the configuration of triangle 9,10,11 above, I could fit in one more ie total 29.

Here's the 29 triangles configuration:

http://postimage.org/image/fo9sglp17/



cheers.