if there is 1 child there can be 0 interactions
if there are 2 children there can be only 1 interaction
if there are 3 children there can be 4 interactions
if there are 4 children there can be 9 interactions

how many interactions will there be for 8 children?

Question

if there is 1 child there can be 0 interactions 
if there are 2 children there can be only 1 interaction 
if there are 3 children there can be 4 interactions 
if there are 4 children there can be 9 interactions 

how many interactions will there be for 8 children?

ddcamp · Answer

Do you notice a pattern? What kind of numbers are 1, 4, and 9?

anonymous · Answer

odd even odd?

megannicole51 · Answer

@timo86m

anonymous · Answer

it seems to me the pettern is x^2

anonymous · Answer

for the previous one


like 

1        2^2=4
2        3^2=9         

so     
x        (x-1)^2

anonymous · Answer

so
8 will be 7*7   just my guess.

anonymous · Answer

thank you :)

anonymous · Answer

I am not sure tho. If it that easy.

anonymous · Answer

it was it was 49

anonymous · Answer

what is the recursive equation represents the pattern?