Tutor MathsGuru: Ask me for your burning Maths questions!

[Dharma]

Q2)


Number of households : number of computers = 3:5
5 = 2 + 2 + 1 = ( 1 x 2) + ( 1 x 2) + ( 1 x 1)
For every 3 households, 2 households have 2 computers each and the remaining household has 1 computer.

Fraction of household that have 1 computer
= 1/3

[Chan09]

Some help plse:

1) A, B and C have 960 sweets altogether. A gave some of her sweets to B and the number of B sweets doubled. Then B gave some to C and the number of C sweets doubled. If the 3 boys had the same number of sweets in the end, how many sweets did A have at first?
Ans: 560

2) After spending 1/4 of his money on a cake and $120 on decorations, Mr Tan had 1/3 of his money left. How much did he have at first?
Ans: $288

[MathIzzzFun]

Chan09:

Some help plse:

1) A, B and C have 960 sweets altogether. A gave some of her sweets to B and the number of B sweets doubled. Then B gave some to C and the number of C sweets doubled. If the 3 boys had the same number of sweets in the end, how many sweets did A have at first?
Ans: 560

2) After spending 1/4 of his money on a cake and $120 on decorations, Mr Tan had 1/3 of his money left. How much did he have at first?
Ans: $288

Hi

hope this helps

http://i52.tinypic.com/2zfopqd.jpg\">

cheers.

[Chan09]

A, B and C shared $372. After A spent 2/5 of his share, B spent 1/2 of his share and C spent 1/3 of his share, the boys found they had the same amt of money left.

a) what is the ratio of A share to B to C?
Ans:10:12:9

b) how much did they spend altogether?
Ans: $156

I tried making numerator the same.
2/5: 1/2: 1/3 to be 2/5: 2/4: 2/6
Then taking total denominator 5+4+6= 15 units => $372 but couldn’t get the answer?

[MathIzzzFun]

Chan09:

A, B and C shared $372. After A spent 2/5 of his share, B spent 1/2 of his share and C spent 1/3 of his share, the boys found they had the same amt of money left.

a) what is the ratio of A share to B to C?
Ans:10:12:9

b) how much did they spend altogether?
Ans: $156

I tried making numerator the same.
2/5: 1/2: 1/3 to be 2/5: 2/4: 2/6
Then taking total denominator 5+4+6= 15 units => $372 but couldn't get the answer?

Hi

Amount left:
A= 3/5 = 6/10
B= 1/2 = 6/12
C= 2/3 = 6/9

So ratio of money share, A: B:C = 10: 12: 9

Total number of units = 10u+12u+9u =31u
31u = $372, 1u = $ 12

Total amount spent
= Total amount of money - total left
= 31u - 6u x 3
= 13u
= 13 x $12
= $ 156

cheers.

[Bunny27]

MathsGuru,

Pls help with this Ques:

1. At the Disney on Ice show, the number of men is 95 less than women. There are 124 more children than the total number of men and women. If there are 519 more children than men, how many children are there at the show?

Thanks

mathsguru:

Original Title: Let MathsGuru Answer Your Burning Maths Questions!

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[charsen]

Please help with this area problem in My Pals Workbook Part1 - 5A Pg.186

Attached the figure http://i55.tinypic.com/212z3hd.jpg\">

[MathIzzzFun]

charsen:

Please help with this area problem in My Pals Workbook Part1 - 5A Pg.186

Attached the figure http://i55.tinypic.com/212z3hd.jpg\">

Hi

the question is not set correctly. To get a unique answer, one possibility is to change the area of rectangle to 90 sq cm. If we use the area as given ie 94 sq cm, then there could be 3 possible answers - 75 2/3 sq cm, 77 sq cm, 78 1/3 sq cm.

If 90 sq cm is used instead, then there is only one unique answer as shown below.

http://i51.tinypic.com/14kh7qf.jpg\">

cheers.

[wahwah]

Hi,

Need help with the following question, it is not a tough question but I can’t get the model right, my model doesn’t seem to make sense.
Many thanks in advance.

Maggie had twice as much money as Leslie. After Maggie spent $32 and Leslie spent $18, they have the same amount of money left. How much did each of them have at first?

[charsen]

wahwah:

Hi,

Need help with the following question, it is not a tough question but I can't get the model right, my model doesn't seem to make sense.
Many thanks in advance.

Maggie had twice as much money as Leslie. After Maggie spent $32 and Leslie spent $18, they have the same amount of money left. How much did each of them have at first?

see if this helps.
-charsen http://i51.tinypic.com/15ceblh.jpg\">