Q&A - P4 Math

[tianzhu]

Taurus:

2. Siti had 6 times as many apples as David at first. Siti had given 450 apples to David, they had an equal number of apples.
A) Find the number of apples David had at first.
B) David gave away some apples and had half the number of apples Siti had. How many apples did David give away?

Thanks.

Hi

This question has been discussed before.

Please go to page 207 of this thread.
http://www.kiasuparents.com/kiasu/forum/viewtopic.php?f=66&t=149&start=2060

Best wishes

[cftan]

tianzhu:

cftan:

Why is u = 8?


Btw, the answer provided is : Muthu is 2 years old now.

Hi

Muthu is 2 years old.

You may look at this similar question as an example.

Hope this helps.

Best wishes

http://farm9.staticflickr.com/8256/8639626358_d56389ea69_z.jpg\">

Thank you.

[tianzhu]

cftan:

Thank you.

Hi

You're welcome.

Best wishes

[Taurus]

tianzhu:

Taurus:

2. Siti had 6 times as many apples as David at first. Siti had given 450 apples to David, they had an equal number of apples.
A) Find the number of apples David had at first.
B) David gave away some apples and had half the number of apples Siti had. How many apples did David give away?

Thanks.

Hi

This question has been discussed before.

Please go to page 207 of this thread.
http://www.kiasuparents.com/kiasu/forum/viewtopic.php?f=66&t=149&start=2060

Best wishes

Thanks for your help.

[fohope]

Hi

Pls help me with these problem sum.

Thank in advance.

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?

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?

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?

[fohope]

Jenny had 3/7 as much money as Kenny. If they spent $252 each, Jenny's money will be only 2/7 of Kenny's. How much money did Kenny have more than Jenny

http://i46.tinypic.com/eizye.png\">


Hi,
Is there any other method to this question?
I dont understand the answer.TIA

[fohope]

Jamesbond:

smartmummy:

[quote=\"Jamesbond\"]http://i45.tinypic.com/2hpriiv.jpg\">


Hi Help me solve this....Thx.

a) my did using guess and check method
7*7 5*5 24
ans:5m
b) he said the length of dotted stripe is same as the length of square.but i feel its more than that.do u have the answer?
is ans 8m2?

This question is from Henry Park PS Sa2 2009.
Ans given is
a)5m
b)8m2[/quote]Hi
My doubt is
Why the length of dotted stripe is same as the length of square? It should be longer a bit.
Anyone can explain?
Thanks in advance.

[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?

http://i44.tinypic.com/29eru1.jpg\">

[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\">