Question

DUE IN 10 MINUTES, PLEASE HELP ME!!!!!!! using only the digits 1-8 how many 6 digit numbers can be formed if adjacent digits must be different

Answer 1

i multiplied 8*7*7*7*7*7 and got 134,156

Answer 2

i think its 8*7*6*5*4*3

Answer 3

nope because you can repeat numbers

Answer 4

as long as they are not adjacent

Answer 5

its beenn such a long time

Answer 6

oh i see - ok that wrong then

Answer 7

whole number? :D
lol, this is a crazy problem

Answer 8

Its not what cwrw said??

Answer 9

no because you can repeat numbers

Answer 10

O_o... Uh..

Answer 11

@KingGeorge

Answer 12

Ok, I got it. Add to the list if am missing anything...

8^3 * 7^3 = 175616 2 combo

8^3 * 7^2 * 6 = 150528 6 Combo
8^3 * 7^2 * 5 = 125440 6 Combo
8^3 * 7^2 * 4 = 100352 6 Combo

8^3 * 6^2 * 7 = 129024 6 Combo

8^3 * 7 * 6 * 5 = 107520 (this is the hardest one)

8^2 * 7^3 * 6 = 131712 6 Combo
8^2 * 7^3 * 5 = 109760 6 Combo

Answer 13

8^3 * 7 * 6 * 5 = 107520 12 Combination total

Mirror
8*7*8*6*8*5 5*8*6*8*7*8
8*7*8*5*8*6 ...
8*6*8*7*8*6
8*6*8*6*8*7
8*5*8*6*8*7
8*5*8*7*8*6

Sum of 12

8*_*8*_*_*8 8*_*_8_*8
Looks like 12 comb

total of 24 for this pattern


62 in totals...?

Answer 14

thats not correct because of the fact the you would have adjacent numbers next to each other

Answer 15

adjacent number like...? lol

Answer 16

it like ababab. so, it would be
8 * 7 * 7 * 7 * 7 * 7

Answer 17

:? I was under the assumption that 8787878 is ok since the "adjacent number is different "87..."

Answer 18

8 * 7 * 7 * 7 * 7 * 7 = ...
that was my calculation

Answer 19

the first digit, obvious we can select 8 numbers

2nd digit we only can select 7 numbers (so that no dupication here)

3th digit, we can select 7 numbers (remember there are 8 numbers, so if the left number is 1, we can choce 2,3,4,5,6,7,8)

4th digit, still we can select 7 numbers
and so on ....