Tutor MathsGuru: Ask me for your burning Maths questions!

[CoffeeCat]

ruyu:

They givin us 4 full marks yay so i A* wohoooo

if they never give you the 4 marks will you get an A*? just curious how many A* your class gets? Because A* in p6 are not common i think.

[ruyu]

CoffeeCat:

if they never give you the 4 marks will you get an A*? just curious how many A* your class gets? Because A* in p6 are not common i think.

yeah ppl say the paper hard but it is easy if you know the concept and apply them i am always top in mt math and science but not for english my weakest!

[shemum]

Dear Maths Guru or any experts,


Please help to solve the below question.

3 similar oven toasters and 4 similar kettles cost $120.
2 such oven toasters and 1 such kettle cost $95.
Find the cost of an oven toaster.

Thank You.

[ruyu]

shemum:

Dear Maths Guru or any experts,


Please help to solve the below question.

3 similar oven toasters and 4 similar kettles cost $120.
2 such oven toasters and 1 such kettle cost $95.
Find the cost of an oven toaster.

Thank You.

this question was already answered in maths guru forum

[Maths Monster]

delete

[tutortamil]

great

[mathsguru]

YLH88:

Hi Mathsguru,


Need your help with the following questions :

1) In the figure below, which is not drawn to scale, 1/5 of the circle is shaded. The ratio of the area of the square to the sum of area of the rectangle and the circle is 1 : 2. 60% of the square is shaded. 1/3 of the rectangle is shaded. What is the ratio of the area of the circle to the square to the rectangle ?
(ans : 5 : 10 : 15)

http://www.postimage.org/image.php?v=TsM_an9


2) SCGS SA1 2009 P2 Qn 17
A set of dictionaries which fitted exactly 4 shelves, each 2.05 m long, was replaced by a new set. Every 7 old dictionaries was replaced by 4 new ones, each 5 cm thick. If the new set of dictionaries also fitted the 4 shelves exactly, what was the difference in the number of dictionaries between the two sets ?
(ans : 120)


3) Red Swastika SA1 2009 P2 Qn 16
Alan, Ben and Charles had 864 trading cards. Ben won some of the cards from Alan and as a result, Ben's cards increased by 50%. Charles then won some cards from Ben and Charles' cards increased by 40%. Finally, Charles lost some of his cards to Alan and Alan's cards increased by 20%. How many cards did Alan have at first ?
(ans : 368)


4) Red Swastika SA1 2009 P2 Qn 17
The distance between Town P and Town Q was 480 km. At 10 30, Mr Poh left Town P travelling at a constant speed towards Town Q to meet his wife. At the same time, Mrs Poh who was at Town Q travelled towards Town P at a constant speed. Mr and Mrs Poh met each other at 14 30. Mrs Poh was travelling at 20 km/h faster than Mr Poh. What was the speed Mrs Poh was travelling at ?
(ans : 70 km/h)


5) Red Swastika SA1 2009 P2 Qn 9
Mr Fernandex drove from home to work at 60 km/h. After work, he needed to rush home for dinner and increased his speed on his way home by 30 km/h. As a result, he took 5 minutes less than what he had taken on his way to work. What was the distance between his house and office ?
(ans : 15 km)


If the same set of questions have been posted before, would greatly appreciate if someone can point me to the pages.

Thank you very much!

Hi YLH88,

Finally can catch a breather now that SA1 is almost over.

Although many other fellow KSPs have kindly posted their solutions, here are mine anyway. Hope they help!


MathsGuru

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

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

http://www.postimage.org/image.php?v=aVIBD79

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

http://www.postimage.org/image.php?v=aVIBI6r

[mathsguru]

Herbie:

Thanks VC and Dharma Can help with the qn below?


There were some chairs in a school hall. 1/2 of the chairs were placed in short rows while 2/5 of the chairs were placed in long rows. The rest of th chairs were stacked at the back of the hall.

There were 15 short rows and long rows. If each short row contained 7 chairs less tha each kong rows, how many chairs were there in the wall altogether?

Tx

Dear Herbie,

Here's my solution!

Cheers,
MathsGuru

http://www.postimage.org/image.php?v=Pq3acIi

[mathsguru]

Maths Monster:

Can anyone can solve this without using guess and check method?


P6 SA1 2009 Paper2 Q14

Audrey and Belle has some money each. If Audrey spends $18 and Belle spends $24 each day, Audrey will have $25 left when Belle has spend all her money. If Audrey spends $13 and Belle spends $30 each day, Audrey will have $139 left when Belle has spend all her money. How much money do they have altogether?

[Ans: 655]

Hi Maths Monster,

Here's my solution!


MathsGuru

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

[mathsguru]

tisha:

Is it possible to solve these without algebra? These are P5 Questions from past year exam papers for SA1.

I believe algebra is only taught in P6, so just curious how come these questions can be asked for SA1 of P5 :?

Ken and Patrick had $625 at first. After buying some books, the amount of money Ken has left is 4 times the amount of money he spent and the amount of money Patrick has left is 5 times the amount of money he spent. Find the amount of money Patrick had at first if they have a total of $510 left.


There are 85 plates of chicken rice for 80 people. Each adult eats 2 plates of chicken rice and every 3 children share 1 plate of chicken rice. Find the number of adults and children respectively.

Dear Tisha,

Here're my solutions!


MathsGuru

http://www.postimage.org/image.php?v=aVICsv9

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