Stuck!
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Re: Stuck!
It looks to me as alternatively dividing and multiplying by increasing one number each time:
48 / 2 = 24
24 x 3 = 72
72 / 4 = 18
18 x 5 = 90
90 / 6 = 15
48 / 2 = 24
24 x 3 = 72
72 / 4 = 18
18 x 5 = 90
90 / 6 = 15
Re: Stuck!
Hi Flosi
The sequence alternates between multiplication and division, whilst moving up one number each time:
48 /2=24
24 x3=72
72 /4=18
18 x5=90
So: 90 /6=15
It's quite refreshing for me to be answering rather than the one asking question!
Regards, UmSusu
The sequence alternates between multiplication and division, whilst moving up one number each time:
48 /2=24
24 x3=72
72 /4=18
18 x5=90
So: 90 /6=15
It's quite refreshing for me to be answering rather than the one asking question!
Regards, UmSusu
Last edited by UmSusu on Mon Sep 05, 2011 11:19 am, edited 1 time in total.
UmSusu
Re: Stuck!
Wow
Thanks guys for a quick response.
Wish I could think that quick!
Flosi
Thanks guys for a quick response.
Wish I could think that quick!
Flosi
Re: Stuck!
What levels are these qus? Are they 11+ standard? They seem very challenging to me!
Re: Stuck!
Yes they are 11 plus standard.
Patricia
Patricia
Re: Stuck!
Thank you, Patricia.
Roughly how long would they be expected to spend on a question like this? That's quite a lot of mental maths trial and error to see which pattern emerges, isn't it?
Roughly how long would they be expected to spend on a question like this? That's quite a lot of mental maths trial and error to see which pattern emerges, isn't it?
Re: Stuck!
With practice, and making notes, these questions should be completed within 30 seconds.
I weekly give daily exercises to include doubling/halving/multiplying/division/adding/subtraction a little every day, 10 sums at the breakfast table will give surprising results over a short period of time.
Divide an A4 sheet into 6 sections in each section place 10 sums, each section containing the same type of problem, all adding, all subtraction, all doubling/halving etc etc. Do not use huge numbers, once the smaller numbers have been mastered the larger numbers become easy.
One section a day is not too much on the work load.
Patricia
I weekly give daily exercises to include doubling/halving/multiplying/division/adding/subtraction a little every day, 10 sums at the breakfast table will give surprising results over a short period of time.
Divide an A4 sheet into 6 sections in each section place 10 sums, each section containing the same type of problem, all adding, all subtraction, all doubling/halving etc etc. Do not use huge numbers, once the smaller numbers have been mastered the larger numbers become easy.
One section a day is not too much on the work load.
Patricia
Re: Stuck!
Patricia, you are brilliant. Thank you so much. Your support is priceless.
When I set these daily sums, do you advise straight multiplying, for example, or a multiple +1, so they get into the habit of looking for the hidden extras?
When I set these daily sums, do you advise straight multiplying, for example, or a multiple +1, so they get into the habit of looking for the hidden extras?