North London Consortium 2013 Group 2
Moderators: Section Moderators, Forum Moderators
-
- Posts: 736
- Joined: Sat Dec 03, 2011 4:14 pm
North London Consortium 2013 Group 2
Question 38 - Can anyone help with this question?
Re: North London Consortium 2013 Group 2
Can you type it out?
-
- Posts: 736
- Joined: Sat Dec 03, 2011 4:14 pm
Re: North London Consortium 2013 Group 2
Sorry - it is copied out below.
Magda and her friends go to the cinema.
They buy 1 large tub of popcorn, 4 fizzy drinks and 10 packets of crisps. The bill comes to £10.89.
Lena and her friends go to the cinema.
They buy 1 large tub of popcorn, 3 fizzy drinks and 7 packets of crisps. The bill comes to £8.64.
How much would it cost to buy 1 large tub of popcorn, 1 fizzy drink and 1 packet of crisps?
Magda and her friends go to the cinema.
They buy 1 large tub of popcorn, 4 fizzy drinks and 10 packets of crisps. The bill comes to £10.89.
Lena and her friends go to the cinema.
They buy 1 large tub of popcorn, 3 fizzy drinks and 7 packets of crisps. The bill comes to £8.64.
How much would it cost to buy 1 large tub of popcorn, 1 fizzy drink and 1 packet of crisps?
Re: North London Consortium 2013 Group 2
What is the answer?
-
- Posts: 736
- Joined: Sat Dec 03, 2011 4:14 pm
Re: North London Consortium 2013 Group 2
don't know - tried simultaneous equations and ratios but am stumped.
There seems to be some information missing unless I'm missing something really obvious and being tunnel visioned which is why I hope someone will come along and solve the riddle
There seems to be some information missing unless I'm missing something really obvious and being tunnel visioned which is why I hope someone will come along and solve the riddle
Re: North London Consortium 2013 Group 2
Well this is what I did ...
I subtracted to get what one fizzy drink and 3 packets of crisps is.
Then I rewrote the first as:
1 large tub of popcorn + 1 fizzy drink + 1 packet of crisps + (3 fizzy drinks and 9 packets of crisps) is 10.89
Does that help?
I subtracted to get what one fizzy drink and 3 packets of crisps is.
Then I rewrote the first as:
1 large tub of popcorn + 1 fizzy drink + 1 packet of crisps + (3 fizzy drinks and 9 packets of crisps) is 10.89
Does that help?
-
- Posts: 736
- Joined: Sat Dec 03, 2011 4:14 pm
Re: North London Consortium 2013 Group 2
Thank You - quite neat although would a 10/11 year old know how to expand an equation.
Re: North London Consortium 2013 Group 2
I think it's a bit tricky but it doesn't need algebra.
The key is understanding that you don't need the individual price of each thing.
The key is understanding that you don't need the individual price of each thing.
Re: North London Consortium 2013 Group 2
DS has worked it out as follows
1P + 4D + 10C = £10.89
1P + 3D + 7C = £8.64
1D + 3C = £2.25
3D + 9C = £6.75
£10.89 - £6.75 = £4.14
Hope this helps.
1P + 4D + 10C = £10.89
1P + 3D + 7C = £8.64
1D + 3C = £2.25
3D + 9C = £6.75
£10.89 - £6.75 = £4.14
Hope this helps.
Re: North London Consortium 2013 Group 2
Future that's what I did without the need for algebra!