Tutor MathsGuru: Ask me for your burning Maths questions!

[Brenda10]

Muffins:

Hi Brenda10, your daughter just managed to summarise my workings into a few steps! :shock: How old is your DD???

Thank you Muffins.

She is 11 years old.

[YLH88]

Hi all,


Need help with the following questions :

1) Nan Hua SA1 2009 P1 Qn 14
Adrian and Bob started driving at the same time. Bob took 6 hours to complete his journey while Adrian took 9 hours to complete his. After 3 hours, the two men were left with the same distance to complete. What is the ratio of the distance of Bob's journey to the distance of Adrian's journey ?

a) 1:2
b) 1:3
c) 2:3
d) 4:3


2) Nan Hua SA1 2009 P1 Qn 15
In the figure, not drawn to scale, the ratio of the area of Circle A to Circle B to Circle C is 3 : 4 : 10. If 1/3 of B is shaded, what is the ratio of the shaded part to the unshaded part of the figure ?

a) 1:17
b) 2:13
c) 3: 17
d) 4:13

http://www.postimage.org/image.php?v=Tshduyr

3) AiTong SA1 2009 P2 Qn 15
Tommy and Wilson jog on a hexagon track (6 equal sides) at 8 am. Tommy starts at point C while Wilson starts at point F. Both jog in the direction as shown by the arrows. Tommy's speed is 1.5 times Wilson's.
a) At which point will they meet ?
b) If they meet at 8.20 am, find Tommy's speed ?

http://www.postimage.org/image.php?v=PqNUlGS

Thank you so much!

[Brenda10]

YLH88:

Hi all,


Need help with the following questions :




2) Nan Hua SA1 2009 P1 Qn 15
In the figure, not drawn to scale, the ratio of the area of Circle A to Circle B to Circle C is 3 : 4 : 10. If 1/3 of B is shaded, what is the ratio of the shaded part to the unshaded part of the figure ?

a) 1:17
b) 2:13
c) 3: 17
d) 4:13

http://www.postimage.org/image.php?v=Tshduyr

Thank you so much!

Hi, for this question, answer very hight chance should be (b)

A B C

3:4:10
9:12:30 (x3 due to 1/3 of B is shaded)
4 (B shaded = 1/3, use 12/3=4)

Then whole figure 30 - 4 also, get 26

4:26
Then simplified to
2:13

Hopefully this answer is correct.

Thank you.

[MOE Hater]

YLH88:

Hi all,


Need help with the following questions :

1) Nan Hua SA1 2009 P1 Qn 14
Adrian and Bob started driving at the same time. Bob took 6 hours to complete his journey while Adrian took 9 hours to complete his. After 3 hours, the two men were left with the same distance to complete. What is the ratio of the distance of Bob's journey to the distance of Adrian's journey ?

a) 1:2
b) 1:3
c) 2:3
d) 4:3


2) Nan Hua SA1 2009 P1 Qn 15
In the figure, not drawn to scale, the ratio of the area of Circle A to Circle B to Circle C is 3 : 4 : 10. If 1/3 of B is shaded, what is the ratio of the shaded part to the unshaded part of the figure ?

a) 1:17
b) 2:13
c) 3: 17
d) 4:13

http://www.postimage.org/image.php?v=Tshduyr

3) AiTong SA1 2009 P2 Qn 15
Tommy and Wilson jog on a hexagon track (6 equal sides) at 8 am. Tommy starts at point C while Wilson starts at point F. Both jog in the direction as shown by the arrows. Tommy's speed is 1.5 times Wilson's.
a) At which point will they meet ?
b) If they meet at 8.20 am, find Tommy's speed ?

http://www.postimage.org/image.php?v=PqNUlGS

Thank you so much!

My teacher has given me the Nan Hua paper and I am pretty sure she wouldn't give P6ers a P1 paper.

[MOE Hater]

KSP:

Just wonder where Mathsguru is. Have not seen her answering questtion for a long time.

Good Point. By the way, how do you know mathguru is a she? Boys tend to be better at Math, I suppose. :roll:

[CoffeeCat]

MOE Hater:

KSP:

Just wonder where Mathsguru is. Have not seen her answering questtion for a long time.

Good Point. By the way, how do you know mathguru is a she? Boys tend to be better at Math, I suppose. :roll:

maybe it's because you were new to this forum or not seen the first page of this thread. Mathsguru mentioned somewhere that she is a she.

[YLH88]

Hi all,


Sorry, to clarify, the below questions are all for P6 level, the P1 and P2 is referring to whether Paper 1 or Paper 2. I have made the amendments for the below. Ya, I too wonder where is Mathsguru .....

Need help with the following questions :

1) Nan Hua P6 SA1 2009 Paper 1 Qn 14
Adrian and Bob started driving at the same time. Bob took 6 hours to complete his journey while Adrian took 9 hours to complete his. After 3 hours, the two men were left with the same distance to complete. What is the ratio of the distance of Bob's journey to the distance of Adrian's journey ?

a) 1:2
b) 1:3
c) 2:3
d) 4:3


2) Nan Hua P6 SA1 2009 Paper 1 Qn 15
In the figure, not drawn to scale, the ratio of the area of Circle A to Circle B to Circle C is 3 : 4 : 10. If 1/3 of B is shaded, what is the ratio of the shaded part to the unshaded part of the figure ?

a) 1:17
b) 2:13
c) 3: 17
d) 4:13

http://www.postimage.org/image.php?v=gxsuNh0


3) AiTong P6 SA1 2009 Paper 2 Qn 15
Tommy and Wilson jog on a hexagon track (6 equal sides) at 8 am. Tommy starts at point C while Wilson starts at point F. Both jog in the direction as shown by the arrows. Tommy's speed is 1.5 times Wilson's.
a) At which point will they meet ?
b) If they meet at 8.20 am, find Tommy's speed ?

http://www.postimage.org/image.php?v=aVD5NPS


Thank you so much!

[YLH88]

[quote]
YLH88 wrote:
Hi all,

Need help with the following questions :




2) Nan Hua SA1 2009 P1 Qn 15
In the figure, not drawn to scale, the ratio of the area of Circle A to Circle B to Circle C is 3 : 4 : 10. If 1/3 of B is shaded, what is the ratio of the shaded part to the unshaded part of the figure ?

a) 1:17
b) 2:13
c) 3: 17
d) 4:13



Thank you so much!


Hi, for this question, answer very hight chance should be (b)

A B C

3:4:10
9:12:30 (x3 due to 1/3 of B is shaded)
4 (B shaded = 1/3, use 12/3=4)

Then whole figure 30 - 4 also, get 26

4:26
Then simplified to
2:13

Hopefully this answer is correct.

Thank you.

[/quote]Hi Brenda10,

I can understand the first part, where
A B C
3:4:10
9:12:30 (x3 due to 1/3 of B is shaded)

But why do you take 30 - 4 ? Your answer is correct (answer in the answer key is b)

[Brenda10]

YLH88:

[quote]
YLH88 wrote:
Hi all,

Need help with the following questions :




2) Nan Hua SA1 2009 P1 Qn 15
In the figure, not drawn to scale, the ratio of the area of Circle A to Circle B to Circle C is 3 : 4 : 10. If 1/3 of B is shaded, what is the ratio of the shaded part to the unshaded part of the figure ?

a) 1:17
b) 2:13
c) 3: 17
d) 4:13



Thank you so much!


Hi, for this question, answer very hight chance should be (b)

A B C

3:4:10
9:12:30 (x3 due to 1/3 of B is shaded)
4 (B shaded = 1/3, use 12/3=4)

Then whole figure 30 - 4 also, get 26

4:26
Then simplified to
2:13

Hopefully this answer is correct.

Thank you.

Hi Brenda10,

I can understand the first part, where
A B C
3:4:10
9:12:30 (x3 due to 1/3 of B is shaded)

But why do you take 30 - 4 ? Your answer is correct (answer in the answer key is b)[/quote]Hi YLH88

Thank you for your confirmation.

30 - 4 becuase of need to find out the unshaded part of the figure, and \"4 \" which shaded is insided the figure C.

[YLH88]

Hi Brenda10,


I understand how you get 4 for the shaded part. But for the unshaded part, why use only 30 ? how about A and B ?

Sorry still a bit confused .. :?