Question

how many 3 digit #s can you make with 3-9 if the resulting number has to be divisible by 3?

Answer 1

easy

Answer 2

I guess they are assuming no repeated digits

Answer 3

yeah since that's just 3* whatever

Answer 4

so the last position be either 3,6,9 ( so we have 3ways )

3 x 7 x 6

Answer 5

3-9 = 3,4,5,6,7,8,9 = 7 digits

Answer 6

i think it's from 309 to 399, all is divisible by 3
so it's 10

Answer 7

ergh no, 319 isnt divisivle by 3

Answer 8

wait I wrotw is wrong

Answer 9

neither 49

Answer 10

309, 339,369,and 399.
the answer is 4

Answer 11

sum of the digits must be divisible by 3

Answer 12

yeah

Answer 13

yeh, if I new that then it would be easier ^

Answer 14

so how would you proceed with the problem knowing its the sum of the digits that makes it divisible by 3

Answer 15

r u consider all the numbers between 3 and 9?

Answer 16

yeah 3 4 5 6 7 8 9

Answer 17

oh if so, then my answer is wrong, sorry i misunderstood the question

Answer 18

haha that's ok

Answer 19

is it between 3 and 9 or from 3 to 9?

Answer 20

from 3 to 9 so 3 and 9 inclusive

Answer 21

the last digit wuold be 12 becacause 12 divided by 3 would bring 4

Answer 22

1 and 2 are not included

Answer 23

nope 1 and 2 aren't included
or 0 either