Stuck on this question

Eleven Plus (11+) in Buckinghamshire (Bucks)

Moderators: Section Moderators, Forum Moderators

Post Reply
hasmum
Posts: 228
Joined: Wed May 18, 2011 11:56 am

Stuck on this question

Post by hasmum »

Hi Patricia or anyone that can help,
My son did a vr paper and I normally go over the mistakes with him, but for this certain question cannot work out how they got to answer, normally ds is good with these has never got them wrong.

1 8 27 64 ?

Answer is 125

Appreciate an answer, sat with this for ages lol.
Kiwimum
Posts: 188
Joined: Sat Mar 19, 2011 10:46 pm

Re: Stuck on this question

Post by Kiwimum »

Hi hasmum

Answer is worked out as

1 x 1 x 1 = 1
2 x 2 x 2 = 8
3 x 3 x 3 = 27
4 x 4 x 4 = 64

so
5 x 5 x 5 = 125
patricia
Posts: 2803
Joined: Mon Jan 30, 2006 5:07 pm

Re: Stuck on this question

Post by patricia »

Its well worth getting your child to recognise these numbers as well as square numbers.

Patricia
hasmum
Posts: 228
Joined: Wed May 18, 2011 11:56 am

Re: Stuck on this question

Post by hasmum »

Hi Patricia,
Thankyou ever so much, I showed my husband this am and he worked it out, before I saw your post, do questions like this actually come up, and also will the children have advanced level codes for the bucks exams. the number q was new to me and my ds.

The difficulty level worries me as at present my ds is getting 75+ out of 80 for ie Walsh, Bright sparks both started in last few weeks. my sons tuition centre gave him Premium series, which I believe are also 21 types seem to be challenging he got 74, 75 77, and 70 for one.

Will the above come up in the bucks exams. ie advanced codes and squaring numbers like the above question.
thanks
hermanmunster
Posts: 12894
Joined: Fri Sep 15, 2006 9:51 am
Location: The Seaside

Re: Stuck on this question

Post by hermanmunster »

I don't know specifically about your area but in most areas it is worth learning to recognise certain series as they can come up in questions:

eg squares... 1 4 9 16 25 36 49 64 81 100 ...

cubes 1 8 27 64...

primes.. 1 2 3 5 7 11 13 17 19 23..

doubling 1 2 4 8 16 32 64 ...
patricia
Posts: 2803
Joined: Mon Jan 30, 2006 5:07 pm

Re: Stuck on this question

Post by patricia »

do questions like this actually come up,

Yes
and also will the children have advanced level codes for the bucks exams.
Yes, each section of types will always have a few harder questions towards the end of each section.
The difficulty level worries me as at present my ds is getting 75+ out of 80 for ie Walsh, Bright sparks both started in last few weeks.
Good Scores!
my sons tuition centre gave him Premium series, which I believe are also 21 types seem to be challenging he got 74, 75 77, and 70 for one.
Premium are not totally 21 type friendly, not recommended.

Your son sounds as though he is doing very well with the above scores. Dont start to panic on his behalf. :wink:

Patricia
hasmum
Posts: 228
Joined: Wed May 18, 2011 11:56 am

Re: Stuck on this question

Post by hasmum »

Thanks kiwimum
Post Reply
11 Plus Mocks - Practise the real exam experience - Book Now