Q&A - P5 Math

[MathIzzzFun]

ttyh:

Carina and Leslie shared some sweets. if Carina received 8 sweets from Leslie, the ratio of the number of sweets she had to the number of sweets Leslie had would be 3:1. If Leslie received 24 sweets from Carina, he would have the same number of sweets from Carina. What was the total number of sweets shared?

If carina received 8 sweets from Leslie,
Carina's sweets : Leslie's sweets --> 3u : 1u

At first,
Carina's sweets : Leslie's sweets --> 3u-8 : 1u+8

If Leslie received 24 sweets from Carina ,
Carina's sweets : Leslie's sweets
--> 3u-8-24 : 1u+8+24
= 3u - 32 : 1u + 32

3u - 32 = 1u+32
1u --> 32

Total number of sweets shared between them --> 4 x 32 = 128

cheers.

[janicelhl]

点击[http://pinyin.cn/1gS5ugsIBs7] 查看这张图片。

[Jamesbond]

MathIzzzFun:

ttyh:

A group of girls was seated in a circle. A box of 115 sweets was passed around in a clockwise direction, starting from Mary. Each girl took a sweet each time the box was passed to her. If Mary took the last sweet in the box, she would have taken a total of 7 sweets. How many girls were there in the group?

115-1 = 114 --> 114 sweets passed 6 full rounds ie every girl took 6 sweets.

Number of girls in the group = 114/6 = 19

cheers.

Hi MathIzzzFun,
Can u pl clear my doubt in this sum.... :?
I worked out as
7 girls....7 sweets
11 girls....6 sweets..
And got 18...
Pl enlighten me.....

[MathIzzzFun]

Jamesbond:

MathIzzzFun:

[quote=\"ttyh\"]A group of girls was seated in a circle. A box of 115 sweets was passed around in a clockwise direction, starting from Mary. Each girl took a sweet each time the box was passed to her. If Mary took the last sweet in the box, she would have taken a total of 7 sweets. How many girls were there in the group?

115-1 = 114 --> 114 sweets passed 6 full rounds ie every girl took 6 sweets.

Number of girls in the group = 114/6 = 19

cheers.

Hi MathIzzzFun,
Can u pl clear my doubt in this sum.... :?
I worked out as
7 girls....7 sweet
11 girls....6 sweets..
And got 18...
Pl enlighten me.....[/quote]
If Mary took the last sweet, she would have 7 sweets -> the rest had 6 sweets so, we remove the extr sweet from Mary, then she will have same number of sweets as the rest - 6 sweets.
This means total of 115-1= 114 sweets distributed to all the girls.
Number of girls = 114÷6 = 19

cheers.

[ttyh]

Thanks for solving my previous questions…

There were 87 children at a party. After 1/3 of the boys and 2/7 of the girls left the party, there were an equal number of boys and girls at the party. How many children remained at the party?

[The Right Equation]

ttyh:

Thanks for solving my previous questions....

There were 87 children at a party. After 1/3 of the boys and 2/7 of the girls left the party, there were an equal number of boys and girls at the party. How many children remained at the party?

first method recommended.

http://i39.tinypic.com/30vevq1.jpg\">

[Jamesbond]

Gotcha MathIzzzFun…Thx.

[Charnic]

Pls help.

During a sale, Wilson spent $120 on a pair of shoes. He spent 2/5 of the remaining money on a bag and a book. After his spending, Wilson realized that he had 1/3 of his money left. If the book cost 1/2 as much as the bag, how much is the bag.
Thanks in advance

[Charnic]

Pls help.

During a sale, Wilson spent $120 on a pair of shoes. He spent 2/5 of the remaining money on a bag and a book. After his spending, Wilson realized that he had 1/3 of his money left. If the book cost 1/2 as much as the bag, how much is the bag.
Thanks in advance

[The Right Equation]

CNS:

Pls help.

During a sale, Wilson spent $120 on a pair of shoes. He spent 2/5 of the remaining money on a bag and a book. After his spending, Wilson realized that he had 1/3 of his money left. If the book cost 1/2 as much as the bag, how much is the bag.
Thanks in advance

http://i40.tinypic.com/5e8znb.jpg\">