Tutor MathsGuru: Ask me for your burning Maths questions!

[Dharma]

YLH88:

Hi Dharma,


You changed the ratio for Peter for both ratio to be the same since both is for Peter, am I right ?

Regards

Correct.

[MMM]

I’ve a question :


The cost of 2 soccer balls and 3 basketballs is $190. The cost of 3 soccer balls and 4 basketballs is $265. What is the cost of 1 basketball and 1 soccer ball respectively?

[ooptimizer]

1 basketball is $40. 1 soccer ball is $35.

[MMM]

ooptimizer:

1 basketball is $40. 1 soccer ball is $35.

How do u compute that?

[YLH88]

Hi Dharma,


Thank you very much!

[MMM]

MMM:

I've a question :


The cost of 2 soccer balls and 3 basketballs is $190. The cost of 3 soccer balls and 4 basketballs is $265. What is the cost of 1 basketball and 1 soccer ball respectively?

Hi,

I managed to solve it. Wondering if there are better ways.

2 soccer balls 3 basketballs $190
3 soccer balls 4 basketballs $265
1 soccer balls 1 basketballs $75 ($265 - $190)
2 soccer balls 2 basketballs $150 ($75 * 2)
1 basket ball $40 ($190-$150)
1 soccer ball $35 ($75-$40)

[sachiko]

Thank you Sister

sister:

This is the \"After\" situation:

Tank ---> 12 units
Pail -----> 1 unit

Since the total volume of water remain constant,

13 units = 8346 ml
1 unit = 8346 / 13 = 642 ml

Pail = 1 unit = 642 ml

Ans. At first, Pail = 642 + 314 = 956 ml

[YLH88]

[quote]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 Ken became 1:4.How many sweets did Ken buy? [/quote]
Hi Mathsguru,

A very happy Chinese New Year !!

So sorry to trouble you straight after the CNY holiday :oops: but I can't get the solution for the below question. This question is very similar to the above Jim and Ken question. I tried using the same method but still not able to get the answer. Therefore, I have no choice but to trouble you again.

Question
Jack had some watermelons. He gave half of his watermelons to Terry. Terry then gave half of his durians to Jack. Jack sold 212 watermelons and Terry sold 56 durians. In the end, the ratio of watermelons to durians for Jack and Terry is 1:8 and 1:2 respectively. How many watermelons did Jack have at first?

Below is my half baked solution, not sure which part I gone wrong :?

Thank you very much!

Wishing all parents in this forum a very happy Chinese New Year !!
http://www.postimage.org/image.php?v=Pqkpy29

[tianzhu]

Hi YLH88


Happy New Year.

I am no mathsguru, hope the solution from an amauterish dad helps.

http://farm5.static.flickr.com/4064/4363880677_0e30e3bb8a_o.jpg\">

[BigDevil]

tianzhu:

Hi YLH88


Happy New Year.

I am no mathsguru, hope the solution from an amauterish dad helps.

http://farm5.static.flickr.com/4065/4364553434_78668a9edc_o.jpg\">

Hi tianzhu,

The question asked how many watermelons Jack had at first, ie before he gave half to Terry. So shouldn't the anwer be (292 x 2) = 584?