Maths questions please

[booellesmum]

I think, but may very well be wrong!!!
In the second part you only need to pay for 72 bottles.
This is 12 lots of 6 bottles.
You would get the other 24 bottles free as 2 free for each of the 12 lots of 6.
72 x £4.50 is £324 though so would be more.

[Mittleme]

thanks for the quick response booellesmum

ur spot on . the answer is Cases by £4


but how did you arrive at 72. thats where i get confused? please kindly walk me through.

my understanding is
if he needs 96 bottles. i thought we would have 16 whole lots which means if for every 6 bottles ,he gets every 2 bottles free, then he would have 32 bottles free. obviously wrong approach am taking

[tiffinboys]

In second way, you are getting 8 bottles for the price of 6. So you would need 96/8= 12 lots. You can work it out the rest.

12 lots equal 96 bottles;
but you pay for 12 lots * 6 bottles (2 are free) = 72 bottles

or you pay= 12 * 6 *£4.50 = £****

[booellesmum]

In second way, you are getting 8 bottles for the price of 6. So you would need 96/8= 12 lots. You can work it out the rest.

12 lots equal 96 bottles;
but you pay for 12 lots * 6 bottles (2 are free) = 72 bottles

or you pay= 12 * 6 *£4.50 = £****

Exactly. I did 96 / 8 = 12
12 x 6 = 72. As you only need to pay for the 6 and not the 2 free ones.

I can see what you were thinking with the 16. 96/6= 16.And yes you would get 32 bottles free, but that way you would have paid for 96 to get the 32 free and would end up with too many bottles in total. ie 128, so you need to find a way of paying for less bottles so the free ones added make the total 96.

Another way would be to think of it as a ratio question. 6:2 = 3:1. You pay for 3 quarters to get the one quarter free. 96/4 = 24. So 24 bottles free.

[Mittleme]

Thank you to you both . tiffinboys and booellesmum. Great stuff.

[tiffinboys]

My thanks to guest55 for insisting to keep it simple, to the level of understanding of 10-11 years old.

[memphis]

Hello,

Please can someone help me with this question:

Two bags of crisps and five chocolate biscuits cost £1.76. If each bag of crisps costs 4p more than a chocolate biscuit, what is the cost of a biscuit?

[booellesmum]

Hi.
£1.76 - 8p = £1.68 ( taken off 8p for the extra paying for 2 pkts of crisps)
£1.68 divided by 7 ( items) = 24p.
Therefore biscuits 24p and crisps 4 p more so 28p.

[memphis]

Hi.
£1.76 - 8p = £1.68 ( taken off 8p for the extra paying for 2 pkts of crisps)
£1.68 divided by 7 ( items) = 24p.
Therefore biscuits 24p and crisps 4 p more so 28p.

Thank you!

[Mittleme]

Hello forum friends

back again to forum after 1 year of rest.

could someone please help with this maths


Question
in Ms Green's class there are 31 pupils.
of these pupils 9 play the piano, 5 play the guitar, but 22 pupils do not play either instrument.
how many pupils play both piano and guitar.

sound simple but am confused .
from my understanding if 22 pupils do not play either instrument then 31-22 = 9 play either instrument?
not sure where to go from here?

Thanks