Q&A - P3 Math

[kwcllf]

Taurus:

Hi,


Anyone can assist on this qns:

The larger of two numbers is four more than three times the smaller number. The sum of the two numbers is 28. What is the smaller number?
1) 4
2) 6
3) 7
4) 8

Thanks

Small Number ----> 1u
Big Number -------> (3 x 1u) + 4

Sum of Small Number + Big Number = 28
------> 1u + 3u + 4 = 28
------> 1u = 6

Therefore, Small Number = 6

[Taurus]

kwcllf:

Taurus:

Hi,


Anyone can assist on this qns:

The larger of two numbers is four more than three times the smaller number. The sum of the two numbers is 28. What is the smaller number?
1) 4
2) 6
3) 7
4) 8

Thanks

Small Number ----> 1u
Big Number -------> (3 x 1u) + 4

Sum of Small Number + Big Number = 28
------> 1u + 3u + 4 = 28
------> 1u = 6

Therefore, Small Number = 6

Thanks a lot

[fohope]

Hi,

Pls help me solve this question. Thanks in advance for your contribution and time.

Tao Nao 2011-Mid year Exam
Jack sold a total of 285 apples and pears.
He sold twice as many apples as pears.
How many more apples than pears di he sell?

[tianzhu]

fohope:

Hi,

Pls help me solve this question. Thanks in advance for your contribution and time.

Tao Nao 2011-Mid year Exam
Jack sold a total of 285 apples and pears.
He sold twice as many apples as pears.
How many more apples than pears di he sell?

Hi

You may use MD.

Apples ------ 2 units
Pears ------- 1 unit

3 units ------- 285
1 unit ------- 95

He sold 95 more apples than pears.

Best wishes

[HAPPYH]

bluesclue:

CMF:

[quote=\"bluesclue\"] Mass of a glass of water =400g. After emptying half the water, the mass =240g.


Question: what is the mass of the empty glass?

If after emptying half the water, the mass (of the remaining half water + glass) = 240g

Then it means half of the water emptied = 160g (400g - 240g)

Therefore full glass of water (without the glass) : 160g x 2 = 320g

The empty glass itself would be : 400g - 320g = 80g

CMF,
Thanks for your post. The model answer given is 40g. Any thoughts why?[/quote]Hi
I am not sure you (or the teacher) modified this question. There is a similar question in P3 My pals workbook but the numbers are different.

Mass of a glass of water =200g. After emptying half the water, the mass =120g.
If you use these numbers the answer will be 40 g (mass of empty glass). Somehow your question has the double of these numbers so the mass of empty glass should be 80g (everything doubled).

Hope this helps!

[bluesclue]

Hi, Yes, numbers were changed as you have noticed. with 200g/ 120g for full/half glass , DS's answer for the empty glass was 40g, but teacher marked it as wrong and said answer should be 20g. :? So just wanted to find out if our understanding is correct. With CMF and your confirmation, i think 40g should be the right answer, thanks.

[HAPPYH]

Hi, I just checked my DD’s workbook. Her teacher marked 40g as the correct answer.

[bluesclue]

Hi HappyH,

Thanks for checking back and confirm.

[HAPPYH]

bluesclue:

Hi HappyH,
Thanks for checking back and confirm.

You are welcome.

[vividlaurel]

Hi,


Can anyone help with this problem. The answer should be got using Heuristics.

Johnny had 30 ml more orange juice than Chloe at first. After Johnny drank 180 ml of orange juice, Chloe had twice as much orange juice as Johnny. How much orange juice did Johnny have at first?

TIA