Q&A - P5 Math

[dazzlego]

whywhy:

thanks. pls help if u hav the qn from RGS SA2 q22 ...find angle PTS (sorry I can't attach file) . my DDI ans is 195 degree but ans sheet shows 185 degree. tks

Hi whywhy,

It is 185 degree. Maybe he calculated wrongly

PTR = 180 - 65 = 115
RTS = 60
PTS = 360 - PTR - RTS
= 360 - 115 - 60
= 185

Cheers :celebrate:

[zombie]

Please help me to solve this question. Thanks.


A fruit seller sells a kiwi at $0.80 and an apple for $0.30.
He sells at $3.00 per pack for every 4 kiwis bundle with a free apple.
After selling the apples and kiwis, the number of apples is 3/10 the number of kiwis he sells.
If he collects a total amount of $38.50, how many kiwis more than apples does he sell ?
:nailbite:

[zombie]

Can someone provide me a link ? I’m using my mom’s account, she’s not around to help me.


I want to post this question on the P5 Q n A, but whenever I go to that forum and post it after its latest thread, I always end up in this forum instead.

[zombie]

Sorry I don't know how to post a new thread onto this forum.

It always end up in 'Primary 5' not the P5 Q n A forum.

Sorry to post under reply instead.

Please help me to solve this question. Thanks. :roll:

Question
A fruit seller sells a kiwi at $0.80 and an apple for $0.30.
He sells at $3.00 per pack for every 4 kiwis bundle with a free apple.
After selling the apples and kiwis, the number of apples is 3/10 the number of kiwis he sells.
If he collects a total amount of $38.50, how many kiwis more than apples does he sell ?

[Maths Hub]

zombie:

Sorry I don't know how to post a new thread onto this forum.

It always end up in 'Primary 5' not the P5 Q n A forum.

Sorry to post under reply instead.

Please help me to solve this question. Thanks. :roll:

Question
A fruit seller sells a kiwi at $0.80 and an apple for $0.30.
He sells at $3.00 per pack for every 4 kiwis bundle with a free apple.
After selling the apples and kiwis, the number of apples is 3/10 the number of kiwis he sells.
If he collects a total amount of $38.50, how many kiwis more than apples does he sell ?

Hi zombie,

The cost of 3 apples and 10 kiwis --> 2 bundles + 1 apple + 2 kiwis = $7.90

We will use guess and check. However, we don't do guess and check blindly. We need to estimate where to guess.

Guess:
First u take $38.50 ÷ $3 to find that you will have around 12 of the bundle.
This give 48 kiwis and 12 apples and the cost is $36.
The 3/10 fraction will tell you that the number of kiwis must be a multiple of 10. Since now you are still short from $38.50, we will find the next multiple of 10 after 48, which is 50.

This means that you will have 50 kiwis and 15 apples.

Check:
Cost --> 12 bundles X 3 + 2 kiwis (not bundled) + 3 apples (not bundled) = 12 X $3 + 2 X $0.80 + 3 X $0.30 = $38.50
We are lucky that we got the correct amount in the first try.

Thus there are 50 - 15 = 35 more kiwis than apples.
:rahrah:

[zombie]

Thanks a lot for the solution !

[weatherbee]

terilyn:

By the way, how to derive the 12 units


Thank so much :slapshead:

Make the base the same. 1/6 = 2/12 and 3/4 = 9/12. Therefore, beginning make them have 12 units. Since choc muffins have 864 more, it will be 12 units + 864.

[bookwormkids]

:?:

Q1
There were 800 guppies and swordfish in an aquarium. After 2/5 of the swordfish and 3/5 of guppies were sold, there were 414 guppies and swordfish left. What fraction of the fish were guppies at first?

Q2
May and Nelly shared a sum of money. 1/4 of May's share is $735 more than 20% of Nelly's share. If they had a total of $8160, what percentage of the sum of money is May's share? (give your ans correct to 1 decimal place).

Thanks.

[MathIzzzFun]

bookwormkids:

:?:

Q1
There were 800 guppies and swordfish in an aquarium. After 2/5 of the swordfish and 3/5 of guppies were sold, there were 414 guppies and swordfish left. What fraction of the fish were guppies at first?



Thanks.

Total 800 guppies and swordfish
5/5 swordfish + 5/5 guppies --> 800
1/5 swordfish + 1/5 guppies --> 800/5 = 160

Left: 3/5 swordfish + 2/5 guppies --> 414
so, 1/5 swordfish --> 414 - 2 x 160 = 94,
total number of swordfish, at first --> 5 x 94 = 470
total number of guppies, at first --> 800 - 470 = 330

at first, guppies as fraction as total number of fish = 330/800 = 33/80

cheers.

[MathIzzzFun]

bookwormkids:

:?:



Q2
May and Nelly shared a sum of money. 1/4 of May's share is $735 more than 20% of Nelly's share. If they had a total of $8160, what percentage of the sum of money is May's share? (give your ans correct to 1 decimal place).

Thanks.

20% of Nelly's share --> 1 unit, Nelly's share --> 5 units
1/4 of May's share --> 1 unit + $735, May's share --> 4 units + $2940

Total --> 9 units + $2940 = $8160
1 unit --> $580
May's share -->
May's share as percentage of total amount
= $5260/8160 x 100%
= 64.5% (to 1 decimal place)

cheers.