how do i do maths

[Waru]

if i have 7 different things, i want to know how many combinations that are possible combining 2 of the 7 things and not having a first item and first item together

and i need one for conbinations of 3, 4, 5, and 6 ._.

[Ad Bot]

[-Kyle]

I think it goes like 7x6x5x4x3x2x1.... I think

[AromaniaFTW]

I think it goes like 7x6x5x4x3x2x1.... I think

he's on the right track.
make something up like this.

[Waru]

how would i do 3, 4, 5, and 6

[AromaniaFTW]

wait
clarify as best you can

[Night Fox]

make a diagram, that's probably the simplest (but probably the most time-consuming as well) way to go about it

and how old are you?
I'm just curious

[Zloff]

if i have 7 different things, i want to know how many combinations that are possible combining 2 of the 7 things and not having a first item and first item together

error

anyway I think something like 7 squared minus 1 might work

[Night Fox]

error

what?
what part of that is an "error?"

[Zloff]

how do you combine something with itself if it is a physical thing

[Night Fox]

how do you combine something with itself if it is a physical thing

um...
that's exactly what he said not to do

[Zloff]

he didn't say anything about the second and second item

[Night Fox]

he didn't say anything about the second and second item

yeah but you know exactly what he means sooo...

[Jairo]

it's called a permutation

[ultimamax]

wouldn't it be 7*7-7?

[Zloff]

yeah but you know exactly what he means sooo...

see that's the sad part-- I don't

edit: from what I am able to comprehend at the moment, what he needs for the last part is 3*4, 3*5, 3*6 and 4*6