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number sequence
Posted: Sun Oct 13, 2013 11:50 am
by sonasona
Can you please help with this....
5,10,30,( ), 600, ( )
Thanks
Re: number sequence
Posted: Sun Oct 13, 2013 12:26 pm
by stevew61
sonasona wrote:Can you please help with this....
5,10,30,( ), 600, ( )
Thanks
X2 X3 X4 X5 X6
So 120 and 3600?
Re: number sequence
Posted: Sun Oct 13, 2013 1:51 pm
by sonasona
Thank you
Re: number sequence
Posted: Tue Oct 15, 2013 9:05 am
by sonasona
I'm not getting these either
( ),1,4,16,64
21,12,24,42,84,48, ( )
Re: number sequence
Posted: Tue Oct 15, 2013 9:16 am
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
Re: number sequence
Posted: Tue Oct 15, 2013 9:25 am
by southbucks3
That last one is just pure evil, sort of thing my nerdy 13 year old would invent. Where did it come from?
Re: number sequence
Posted: Tue Oct 15, 2013 9:55 am
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
Many many thanks
Re: number sequence
Posted: Tue Nov 26, 2013 7:29 pm
by sonasona
Need help please
25,?,49,64,?
from SD book.
Thanks
Re: number sequence
Posted: Tue Nov 26, 2013 7:40 pm
by Tinkers
36
Square numbers
Re: number sequence
Posted: Tue Nov 26, 2013 7:51 pm
by sonasona
I'm so thick! Thank you