Question

A playground is being designed where children can interact with their friends in certain combinations.

If there is 1 child, there can be 0 interactions.
If there are 2 children, there can be 6 interactions.
If there are 3 children, there can be 15 interactions.
If there are 4 children, there can be 27 interactions.

How many interactions will there be for 7 children?

Answer 1

itz 81 i think. if u want, i can show the working

Answer 2

yes please!

Answer 3

hld n k?

Answer 4

okay lol

Answer 5

goodness that took like forever i know. sry anyways. if u want i can form an equation for dat too

Answer 6

how do you figure out the pattern?

Answer 7

uh...did u c the attachment?

Answer 8

yeah lol

Answer 9

okay nvm i get it lol

Answer 10

^_^. goodluck with it anyways!!!!

Answer 11

thanks lol wanna help me with my other ones?

Answer 12

uh...ok...i'll try. dnt have so much faith in me but, dat was just a trial and error method

Answer 13

haha okay

Answer 14

i suck at math so your better than me already lol

Answer 15

u think? lol. goodness ur lol is contagious

Answer 16

haha sorry