DISTRICT 1

[indianpapu]

I feel really stupid asking this but

#26
The number of distinct elements in
[{f,i,v,e} intersection {s,i,x}] union {t,e,n}

ANSWER: 4
I get 8

[bradp]

interesection is what they have in common
so the parenthetical expression reduces to {i}

union is all the elements of both sets

so {i,t,e,n} is the result...
4

[indianpapu]

i knew i was doing something wrong
I unioned them

i feel so stupid now...
thanks

[AuSmith]

That's the best thing about math... it makes most everybody feel stupid.