Tutor MathsGuru: Ask me for your burning Maths questions!

[AbiSuresh]

Hi Maths guru,

There were some sweets in Boxes A, B and C. Box A contained 1/7 of the total number of sweets in Boxes B and C.
The ratio of the number of sweets in Box B to the total number of sweets in Boxes A and C is 3:1.
If there are 30 more sweets in Box B than Box A, find the total number of sweets in Boxes A, B and C.

[MathIzzzFun]

AbiSuresh:

Hi Maths guru,

There were some sweets in Boxes A, B and C. Box A contained 1/7 of the total number of sweets in Boxes B and C.
The ratio of the number of sweets in Box B to the total number of sweets in Boxes A and C is 3:1.
If there are 30 more sweets in Box B than Box A, find the total number of sweets in Boxes A, B and C.

Box A --> 1/8 of total number of sweets -- (A --> 1 part, B&C --> 7 parts, total --> 8 parts)

Box B --> 3/4 of total number of sweets -- (B --> 3 units, A&C --> 1 unit, total --> 4 units)

1 - 1/8 - 3/4 = 1/8

Box C --> 1/8 of total number of sweets

There are 30 more sweets in B than in A,

3/4 - /18 = 5/8

5/8 of total number of sweets --> 30
Total number of sweets --> 8/5 x 30 = 48 sweets.

cheers.

[elishatan]

#1

http://elishatan.com/wp-content/uploads/2013/05/Evernote-Camera-Roll-20130506-142936-e1367824091265.jpg\">

#2
http://elishatan.com/wp-content/uploads/2013/05/Evernote-Camera-Roll-20130506-142928-e1367824147306.jpg\">

#3
http://elishatan.com/wp-content/uploads/2013/05/Evernote-Camera-Roll-20130506-142852-e1367824206891.jpg\">

#4
http://elishatan.com/wp-content/uploads/2013/05/Everno1te-Camera-Roll-20130506-142844-e1367824273638.jpg\">

[AbiSuresh]

Thank you very much

MathIzzzFun:

AbiSuresh:

Hi Maths guru,
There were some sweets in Boxes A, B and C. Box A contained 1/7 of the total number of sweets in Boxes B and C.
The ratio of the number of sweets in Box B to the total number of sweets in Boxes A and C is 3:1.
If there are 30 more sweets in Box B than Box A, find the total number of sweets in Boxes A, B and C.

Box A --> 1/8 of total number of sweets -- (A --> 1 part, B&C --> 7 parts, total --> 8 parts)

Box B --> 3/4 of total number of sweets -- (B --> 3 units, A&C --> 1 unit, total --> 4 units)

1 - 1/8 - 3/4 = 1/8

Box C --> 1/8 of total number of sweets

There are 30 more sweets in B than in A,

3/4 - /18 = 5/8

5/8 of total number of sweets --> 30
Total number of sweets --> 8/5 x 30 = 48 sweets.

cheers.

[hands on blessed mum]

Hi, need your help to solve this question;

[NYPSkiasuparent]

atutor2001:

suiyuan:

Hi
Thank you for your offer.

1)During a warehouse book sale, Sally spent 62.5% of her money on 24 books and 18 pens. She also spent 25% of her remaining money on 18 files. Each pen costs 8/9 as much as the price of one book. The file costs $7.80 less than a book. Find the total cost of one book and one pen.

2)Mr Lim spent $1496 on some comics and dictionaries altogether. The number of comics bought to the number of dictionaries bought was in the ratio of 3 : 2. A dictionary cost $4 more than a comic. The total cost of the comics was 20% more than the total cost of the dictionaries. Find the cost of a dictionary.

Hi suiyuan

You are very \"naughty\". But the 2nd question is a bit easssy!

Regards

Why is she naughty?

[jkids]

hi maths guru

I need some advice, not on problem sums but rather can you recommend an enrichment centre for my child? he is weak in maths, others subjects lik eng and Chinese is ok. recently he failed his maths, got 27/70

he seem to have prob understanding the math q, esp prob sums. what goes wrong, I really duno. we need to explain a few times, but sometime he still dun get it. he only has eng tuition but we intend to withdraw him fr eng class and enrol him for math class. can you recommend? I saw a few...cma , mind matter, mind stretcher...but dun really noe which is a better one...

thanks..

[milo-cupcake]

Hi Maths guru,

This is my DD recently SA1 Maths question. My DD and her classmates answer was 180 but the answer given by the teacher was 120. Please can you tell whose answer is correct?
Thanks in advance!

http://i44.tinypic.com/30igcd2.jpg\">

[MathIzzzFun]

milo-cupcake:

Hi Maths guru,

This is my DD recently SA1 Maths question. My DD and her classmates answer was 180 but the answer given by the teacher was 120. Please can you tell whose answer is correct?
Thanks in advance!

http://i44.tinypic.com/30igcd2.jpg\">

in both cases, the fraction refers to the original number as whole, so the answer is 120

However, if the second sentence is:\"On the second day, he sold 1/3 of the remaining watermelons....\" then the answer will be 180

cheers.

[Arrmanas]

450 - (2/5 x 450) - (1/3 x 450) = 120


The tricky part is "1/3 of his watermelons".

If the question says "1/3 of the balance watermelons" then the last calculation would be [1/3 x ((450 - (2/5 x 450)) = 90]. This gives 180 as the answer.