Question

6 - 1 ≡ ? (mod 7)

Answer 1

6 - 1 ≡ ? (mod 7)
^
?

Answer 2

is mod 7 an option?

Answer 3

well i know how to do mods but what is " ≡ "

Answer 4

what do i do

Answer 5

6-1=5

Answer 6

so is it 2

Answer 7

5 mod 7=5

Answer 8

6 - 1 ≡ ? (mod 7) =5

Answer 9

≡ ?

Answer 10

if you divide 5 by 7 then the remainder is 5

Answer 11

o

Answer 12

so what is this ≡ ?

Answer 13

equivalent to

Answer 14

o

Answer 15

sorry

Answer 16

thanks a lot

Answer 17

a ≡ b (mod n) means a − b is divisible by n

Answer 18

here a =6-1=5
n=7
we need to find a number say b such that
a-b is divisible by 7

Answer 19

o

Answer 20

huh?

Answer 21

i understand thanks

Answer 22

so what's b?

Answer 23

We have to get that number which when divided by 7 gives 5 as remainder..

Answer 24

7

Answer 25

7 divided by 7 gives you remainder 5 ???

Answer 26

@waterineyes Please see this
http://en.wikipedia.org/wiki/Modular_arithmetic

Answer 27

cool

Answer 28

@85295james a-b should be divisible by 7
what's b?
a=5

Answer 29

?

Answer 30

yeah???

Answer 31

is it 1

Answer 32

is 5-1=4 divisible by 7?

Answer 33

is 0 with R4

Answer 34

no it has to be divisible like 7, 14, 21, 28