number sequence

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sonasona
Posts: 869
Joined: Mon Sep 10, 2012 11:51 am

number sequence

Post by sonasona »

Can you please help with this....

5,10,30,( ), 600, ( )

Thanks
stevew61
Posts: 1786
Joined: Fri Nov 17, 2006 9:54 pm
Location: caversham

Re: number sequence

Post by stevew61 »

sonasona wrote:Can you please help with this....

5,10,30,( ), 600, ( )

Thanks
X2 X3 X4 X5 X6

So 120 and 3600?
sonasona
Posts: 869
Joined: Mon Sep 10, 2012 11:51 am

Re: number sequence

Post by sonasona »

Thank you :)
sonasona
Posts: 869
Joined: Mon Sep 10, 2012 11:51 am

Re: number sequence

Post by sonasona »

I'm not getting these either :(

( ),1,4,16,64

21,12,24,42,84,48, ( )
Okanagan
Posts: 1706
Joined: Mon Aug 22, 2011 9:20 pm
Location: Warwickshire

Re: number sequence

Post by Okanagan »

( ),1,4,16,64
x4 - so 0.25 or 1/4

21,12,24,42,84,48, ( )
reverse the digits, then double - so next one will be double 48, i.e. 96
southbucks3
Posts: 3579
Joined: Tue Dec 18, 2012 11:59 am

Re: number sequence

Post by southbucks3 »

That last one is just pure evil, sort of thing my nerdy 13 year old would invent. Where did it come from?
sonasona
Posts: 869
Joined: Mon Sep 10, 2012 11:51 am

Re: number sequence

Post by sonasona »

I'm not sure who produced these questions.....they are in my archive of older papers and I gave them to someone so their Dd could prepare for 2014. They are now coming back to haunt me and it's a little embarrassing as I can't explain. I don't have the answers either so can't even fluke it! I do have this forum though :D

Many many thanks :)
sonasona
Posts: 869
Joined: Mon Sep 10, 2012 11:51 am

Re: number sequence

Post by sonasona »

Need help please :oops:

25,?,49,64,?

from SD book.

Thanks
Tinkers
Posts: 7240
Joined: Mon May 16, 2011 2:05 pm
Location: Reading

Re: number sequence

Post by Tinkers »

36

Square numbers
sonasona
Posts: 869
Joined: Mon Sep 10, 2012 11:51 am

Re: number sequence

Post by sonasona »

I'm so thick! Thank you :D
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