Question

The figure above show an example of a 4-digit identification code used by a certain bank for its customers. If the digits in the code must appear in descending numerical order, not using zero and no digit can be used more than once, what is the difference between the largest and the smallest possible codes?

Answer 1

suggestions?

Answer 2

the numbers are 9,6,4, and 2

Answer 3

I think its 5555

Answer 4

cause 9876 is the largest value minus 4321, which is the lowest value

Answer 5

agreed?

Answer 6

I agree. It seems like the answer.

Answer 7

k

Answer 8

I have one more for you guys

Answer 9

Fin, Bugsy, Violet and Feather are four fish living in two separate tanks. One tank is round and the other is rectangular. How many different living arrangements are possible if at least one fish lives in each tank?

Answer 10

6
7
9
12
14

Answer 11

tips?

Answer 12

can't you do 9871?

Answer 13

ahhh

Answer 14

sorry I didn't read the question right

Answer 15

9876 is the maximum, though

Answer 16

so

Answer 17

ready to help me with the fish tank problem?

Answer 18

yes sure.

Answer 19

Fin, Bugsy, Violet and Feather are four fish living in two separate tanks. One tank is round and the other is rectangular. How many different living arrangements are possible if at least one fish lives in each tank?

Answer 20

here are the answer choices:6 7 9 12 14

Answer 21

any tips?

Answer 22

I'm trying!

Answer 23

k

Answer 24

3 times 4=12?

Answer 25

14

Answer 26

how?

Answer 27

14

Answer 28

why, though?

Answer 29

cal?