Q&A - P4 Math

[Oldschool]

Hi,


What he/she trying to say is the strip can be divided into two right angle triangle.

Each of it has a height which is the same as the length of the smaller square.

And using 1/2 BH for triangle and multiply by 2 will get you the area of the strip.

http://i44.tinypic.com/2el8uia.jpg\">

Regards

[Oldschool]

fohope:

Hi


1) Three numbers are written on a piece of paper. 1/4 of the first number is 10 more than 1/2 of the second number. The third number is twice the second number. The sum of the 3 numbers is 400, what is the first number?

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[Oldschool]

fohope:

Hi


2) A frog jumps 6 cm. The distance it jumps the second time is 4 times the first.. The distance it jumps the third time is 3/4 the distance of the second jump. What is the total distance of the 3 jumps?

http://i41.tinypic.com/oit8d4.jpg\">

[Oldschool]

fohope:

Hi


3) When a bucket was 1/7 filled with water, its weight was 5kg. The weight of the bucket was 23kg when water was filled to its brim. What was the weight of the empty bucket?

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[Always21]

A) A worker packed 5 268 tiles into 6 crates equally. How many tiles were there in each crate?



B) later, his boss threw out some chipped tiles from the crates and told him to repack the rest equally into 10 smaller ones. How many tiles did the boss throw out if there were 525 tiles in each of the smaller crates?

Thank you very much

[Always21]

Please help me with this question



A gardener had 1/2 a bag of soil. He used 5/8 of it to fill up a pot. What fraction of the soil was left?

Thank you in advance.

[Maths Hub]

Always21:

A) A worker packed 5 268 tiles into 6 crates equally. How many tiles were there in each crate?



B) later, his boss threw out some chipped tiles from the crates and told him to repack the rest equally into 10 smaller ones. How many tiles did the boss throw out if there were 525 tiles in each of the smaller crates?

Thank you very much

a) 5268/6=878
b) Total tiles now--> 10 X 525 = 5250
5268- 5250=18

Cheers.

[Always21]

Maths Hub:

Always21:

A) A worker packed 5 268 tiles into 6 crates equally. How many tiles were there in each crate?



B) later, his boss threw out some chipped tiles from the crates and told him to repack the rest equally into 10 smaller ones. How many tiles did the boss throw out if there were 525 tiles in each of the smaller crates?

Thank you very much

a) 5268/6=878
b) Total tiles now--> 10 X 525 = 5250
5268- 5250=18

Cheers.

Thank you very much

[fohope]

Hi,

Thanks Old school.
I have some more questions. I do not have the answer and just the questions.
Pls help me to solve. Thanks in advance.

1)There are 480 balls in a shop. 1/3 of them are footballs, 115 are basketballs and the rest are volleyballs. If 41 volleyballs and 3/4 of the footbalss are sold, how many balls will be left?

2) Jack had 50 marbles. His sister, Jill, had 160 marbles more than him. After receiving an equal amount of marbles from their mother, Jack has 1/3 as many as Jill.
How many marbles did their mother give each of them?

3) There are altogether 122 cars in Car Park X and Car Park Y.Car Park Y and Cark Z have a total of 146 cars.The number of cars in Car park X is 5/8 the number of cars in Car Park Z.How many cars are there in the 3 car parks altogether?


4)Ali had 3/5 as many green marbles as blue marbles at first . After buying another 30 green marbles , he now has 5/7 as many green marbles as blue marbles . How many green and blue marbles did he have at first?

[Oldschool]

fohope:

Hi,

Thanks Old school.
I have some more questions. I do not have the answer and just the questions.
Pls help me to solve. Thanks in advance.

1)There are 480 balls in a shop. 1/3 of them are footballs, 115 are basketballs and the rest are volleyballs. If 41 volleyballs and 3/4 of the footbalss are sold, how many balls will be left?

Football --> 1/3 x 480 --> 160

3/4 sold --> 3/4 x 160 --> 120 sold

No. of balls left = 480 - 120 - 41 = 319


2) Jack had 50 marbles. His sister, Jill, had 160 marbles more than him. After receiving an equal amount of marbles from their mother, Jack has 1/3 as many as Jill.
How many marbles did their mother give each of them?


Jack --> 50
Jil --> 50 + 160 --> 210

Guess and check,
1/3 --> 8/24 --> 80/240 --> 50+30 / 210+30

Mother gave each of them 30 marbles.

Alternative,

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3) There are altogether 122 cars in Car Park X and Car Park Y.Car Park Y and Cark Z have a total of 146 cars.The number of cars in Car park X is 5/8 the number of cars in Car Park Z.How many cars are there in the 3 car parks altogether?

The statement \"number of cars in Car park X is 5/8 the number of cars in Car Park Z\" means the ratio of car in X to Z is 5:8.

X : Z
5U : 8U

X + Y = 122
Y + Z = 146

Z-X = 24
8U - 5U = 24
3U = 24
U = 8

X = 5U = 40
Z = 8U = 64
Y = 122 -40 = 82

Total = X+Y+Z = 186


4)Ali had 3/5 as many green marbles as blue marbles at first . After buying another 30 green marbles , he now has 5/7 as many green marbles as blue marbles . How many green and blue marbles did he have at first?

LCM of 5 and 7 is 35, then

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