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 Post subject: Maths questions please
PostPosted: Mon Feb 02, 2015 7:33 pm 
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Joined: Sat Jan 03, 2015 4:26 pm
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 Could someone please kindly confirm if my answers are correct for the question below.
Thank you



The timetable below shows information about the overnight train

London Euston Station (Fri)depart 1957
Birmingham International (Fri)depart 2107
Glasgow (Sat)arrive 0645




How long does the train take
a) from London Euston to Birmingham International-------------Answer 1hr 10mins


b) from London Euston Station to Glasgow-----------------Answer 9hrs 38mins



much appreciated.


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PostPosted: Mon Feb 02, 2015 7:46 pm 
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Look at (b) again - how long is it to midnight? A number line might help.


19:57 ........................... 00:00 .......................... 06:45


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PostPosted: Mon Feb 02, 2015 8:37 pm 
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round up and round down to the nearest whole hour, then add on the minutes used for the rounding

for instance, 1957 is 2000 (with 3 mins used for rounding)

2107 is 2100 using 7 minutes for rounding down

so its a total of 1 hr and 10 minutes (7+3, from the rounding)


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PostPosted: Mon Feb 02, 2015 8:54 pm 
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I think for b) you have mis read the question and calculated from Birmingham instead of from Euston?


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PostPosted: Mon Feb 02, 2015 9:26 pm 
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thank you All


yes correct i misread the question to b). dd is well ahead of me. she wrote 10hrs 48 mins. was marking the questions whilst she was away so had no chance to correct me.


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PostPosted: Tue Feb 03, 2015 9:05 pm 
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Another one please kindly help correct



Question
Janice has 10 pens

5 are blue pens and 5 are red.

8 are felt tip pens


Fill in the blanks in this statement.



There are between .............. and ................. blue felt tip pens




Answer

dd wrote 3 and 5.


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PostPosted: Tue Feb 03, 2015 9:22 pm 
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Please help with how to work this out .



not sure why i can't copy and paste diagrams onto this forum. would make life so much easier for people that are helping .


Ok this one is Nos 26 of the Channing School 11+ sample papers

http://www.channing.co.uk/fileadmin/con ... r_2011.pdf


but heres the question without a diagram.



This shape has an area of 63cm2.

it is made from square tiles .

Find the perimeter of the shape.

any ideas please?how do we derive the perimeter from just telling us that the area is 63?


Thank you


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PostPosted: Tue Feb 03, 2015 9:43 pm 
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The question about Janice is correct ... (compare that with the other one we did)

There are 7 equal squares so what is the area of each square?

Once you know that, then you can work out the side length of each square and hence the perimeter.

Get back to me if the hint is not enough help.


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PostPosted: Tue Feb 03, 2015 9:48 pm 
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Thanks a million Guest55.

Yes very similar to the one you helped with. i actually remembered when i was posting this.




will get back to you re; the perimeter question.


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PostPosted: Tue Feb 03, 2015 10:00 pm 
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ok so area of each square is 63/7 =9


perimeter of each square will be 4x side = 4x3 = 12


perimeter of all squares = 12 x7 = 84...

hmmn am not convinced at my working though . is this correct?


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