In a listing of one number from each of the ve equivalence classes modulo 5, four
of the values are 1211, 218, -100, and -3333. Which equivalence class is missing?

Question

In a listing of one number from each of the ve equivalence classes modulo 5, four
of the values are 1211, 218, -100, and -3333. Which equivalence class is missing?

anonymous · Answer

divide by 5, take the remainder, see which one is missing

anonymous · Answer

Is it 4 mod (5), the one that is missing?

anonymous · Answer

first three in your head you get 
$1211\equiv 1(5)$ and $218\equiv 3(5)$and $-100\equiv 0(5)$
only need to check -3333

anonymous · Answer

which is 2(5), leaving 4(5) missing?

anonymous · Answer

yes

anonymous · Answer

please hear my plea

anonymous · Answer

Electric Aunt Jamima?

anonymous · Answer

my all time fave!!!!!

anonymous · Answer

actually that and dog breath in the year of the plague

anonymous · Answer

Wish that were an answer to one of these questions.

anonymous · Answer

Have you seen the movie version?  Very strange...

anonymous · Answer

200 motels?

anonymous · Answer

No, Uncle Meat had footage which accompanied it.

anonymous · Answer

wow really? can i youtube it?

anonymous · Answer

Since I got a Zappa fan to help with one, got any guesses on this one?

Determine n between 0 and 19 such that (2311)(3912)  n mod 20.

Something like 11*12 = 132 = 12 mod(20)?

anonymous · Answer

I'm sure there are clips, perhaps too obscure.

anonymous · Answer

i am not sure i get the question

anonymous · Answer

determine n which will fall in the equivalence class for 2311*3912

anonymous · Answer

$$(2311)(3912)\equiv n (\text{mod}) 20. $$ like that?

anonymous · Answer

yes

anonymous · Answer

i think since 20 divides 100  you only need the last two digits

anonymous · Answer

k, so 12

anonymous · Answer

gonna close this one and move on, thanks for helping

anonymous · Answer

yes that looks right 
you computed $11\times 12$ and then the remainder is 12

anonymous · Answer

yw