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 Post subject: Whitgift sample 11+ Maths papers answersPosted: Tue Jan 27, 2015 8:31 pm

Joined: Sat Jan 03, 2015 4:26 pm
Posts: 183
Hi All

could someone please kindly help with the following answers to the Maths sample questions

url is

Question is in 2 parts

1.Groups a,b and c

18 and 19

heres questions and answer to 18.

To go and watch a film at the cinema, the seats cost £3 each for a child and £7 each for an adult. I was charged £51 for all of the seats I bought.
(a) Did I buy more than 7 adult tickets?
(b) If there were more adult tickets than child tickets, how many of each did I buy?
(c) If there were more child tickets than adult tickets, how many of each did I buy?

please confirm we are correct

a) no
b)6 adults and 3 child
c)3 adults and 10 child

Second Part

2. Group B and C

Questions 8,9 and 10

Thanks in anticipation

Last edited by Mittleme on Tue Jan 27, 2015 8:47 pm, edited 1 time in total.

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 Post subject: Re: Whitgift sample 11+ Maths papers answersPosted: Tue Jan 27, 2015 8:46 pm

Joined: Mon Feb 12, 2007 1:21 pm
Posts: 11715
Quote:
To go and watch a film at the cinema, the seats cost £3 each for a child and £7 each for an adult. I was charged £51 for all of the seats I bought.
(a) Did I buy more than 7 adult tickets?
(b) If there were more adult tickets than child tickets, how many of each did I buy?
(c) If there were more child tickets than adult tickets, how many of each did I buy?

Hints

(a) How much does 7 adult tickets cost?

(b) what combinations give £51 as a cost? Try some numbers

(c) ditto

Sorry haven't got time to look up the questions. If you post them I'll give more hints.

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 Post subject: Re: Whitgift sample 11+ Maths papers answersPosted: Tue Jan 27, 2015 8:53 pm

Joined: Sat Jan 03, 2015 4:26 pm
Posts: 183
OK thanks but sorry am unable to copy and paste the ones with a diagram which to be honest are the ones i really need help with.

but heres the rest

9. A box of kiddimix contains 20 chocolates of which 8 are plain chocolates and 12 are milk chocolates. If 16 of the 20 have soft-centres, what can you say about how many plain chocolates there are with soft-centres

18.i already answered in my original post above.please kindly check and confirm.thank you

￼￼

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 Post subject: Re: Whitgift sample 11+ Maths papers answersPosted: Tue Jan 27, 2015 8:56 pm

Joined: Mon Feb 12, 2007 1:21 pm
Posts: 11715
Quote:
9. A box of kiddimix contains 20 chocolates of which 8 are plain chocolates and 12 are milk chocolates. If 16 of the 20 have soft-centres, what can you say about how many plain chocolates there are with soft-centres

SO only 4 don't have soft centres ... those four could be either plain or milk.

But at least 4 of the plain must be soft centred ... does that make sense?

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 Post subject: Re: Whitgift sample 11+ Maths papers answersPosted: Tue Jan 27, 2015 8:58 pm

Joined: Sat Jan 03, 2015 4:26 pm
Posts: 183
Great . well explained.

This is what my daughter wrote

All the plain chocolates could be soft centre. what do you think? is that the same as your answer or is yours more correct English?

thanks Guest 55.

Last edited by Mittleme on Tue Jan 27, 2015 9:04 pm, edited 1 time in total.

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 Post subject: Re: Whitgift sample 11+ Maths papers answersPosted: Tue Jan 27, 2015 9:04 pm

Joined: Mon Feb 12, 2007 1:21 pm
Posts: 11715
19 - I got one quarter. Not sure how to explain it as I tried two ways to check.

Triangle CMD if all shaded would be half x side x side = half square

subtract triangle COD = half side x half side = quarter square

half - quarter = quarter of the square.

You can do it by drawing but I can't show that ....

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 Post subject: Re: Whitgift sample 11+ Maths papers answersPosted: Tue Jan 27, 2015 9:06 pm

Joined: Sat Jan 03, 2015 4:26 pm
Posts: 183
19. thanks . daughter got one quarter but she can't seem to explain to me.

i will study your explanation.

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 Post subject: Re: Whitgift sample 11+ Maths papers answersPosted: Tue Jan 27, 2015 9:21 pm

Joined: Mon Feb 12, 2007 1:21 pm
Posts: 11715
The soft centres one - I think they are looking for the fact you know at least four MUST be. Yes they all could be but you cannot know that for sure ....

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 Post subject: Re: Whitgift sample 11+ Maths papers answersPosted: Tue Jan 27, 2015 9:25 pm

Joined: Sat Jan 03, 2015 4:26 pm
Posts: 183
Guest 55 wrote

The soft centres one - I think they are looking for the fact you know at least four MUST be. Yes they all could be but you cannot know that for sure ..

Ok correct will use your wording.

Thanks

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 Post subject: Re: Whitgift sample 11+ Maths papers answersPosted: Tue Jan 27, 2015 9:27 pm

Joined: Sat Jan 03, 2015 4:26 pm
Posts: 183
heres questions and answer to 18.

To go and watch a film at the cinema, the seats cost £3 each for a child and £7 each for an adult. I was charged £51 for all of the seats I bought.
(a) Did I buy more than 7 adult tickets?
(b) If there were more adult tickets than child tickets, how many of each did I buy?
(c) If there were more child tickets than adult tickets, how many of each did I buy?

please confirm we are correct

a) no because then we would have £2 left .
b)6 adults and 3 child
c)3 adults and 10 child

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