This discussion is closed.
coco_pops
Badges:
#1
Report 16 years ago
#1
ok ppl wot u have to do is starting from 1 right at the corner of ur grid then goin on to 2, den 3, den 4, do a 3 step staircase, den a 2 step den a 4 step and go find the formula for each one of dem. ( do each staircase seperately)
u should have: 6n+44,3n+11,10n+110 this is for a 10by10 grid
u can c dat the first numbers are triangular numbers 3,6,10
and the rule for triangular numbers is: n(n+1)/2
there u have the first part to the formula
the u look at 11,44,110 and work out a rule for that which is
11(n³-n)/6

formula: n(n+1)/2 + 11(n³-n)/6

hope this is helpful!!! : )
0
X
new posts
Back
to top
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

Regarding Ofqual's most recent update, do you think you will be given a fair grade this summer?

Yes (345)
34.6%
No (652)
65.4%

Watched Threads

View All