Question

If a, b, c, and d are replaced by four distinct digits from 1 to 9, inclusive, then what's the largest possible value of the difference a.b - c.d?

Answer 1

will fan and medal

Answer 2

Is this multiple choice or no?

Answer 3

unfortunately not

Answer 4

So it's asking if a, b, c, and d are replaced with a random number 1 through 9 whats the highest possible outcome?

Answer 5

yes

Answer 6

Well couldn't it be 36 then?

Answer 7

that couldn't be possibly the greatest possible answer for addition is 18.3. but thats not the question its a.b-c.d and it wants to know what is the greatest number you can get from that subtraction

Answer 8

and see its a decimal on each number

Answer 9

oh

Answer 10

What about 9.9-1.1 Then you get 8.8

Answer 11

ill try

Answer 12

I don't see how it could be any bigger than that as the highest number you get to work with is 9.

Answer 13

it says the numbers have to be distinct so ,aybye 9.1-1.9

Answer 14

Then yeah that's what i would go with

Answer 15

that doesnt work either

Answer 16

Well that's gonna be your largest gap in between numbers, and that's what they want, correct?

Answer 17

\yeah

Answer 18

@imqwerty

Answer 19

Is this like an online course you have or is it on paper?

Answer 20

online course

Answer 21

When you say it doesn't work what do you mean by that? It says its wrong or what?

Answer 22

it says its wrong

Answer 23

So they have to be the same? Like if its 6.1 the other is 1.6, and if its 3.4 then its 4.3?

Answer 24

i dont know

Answer 25

try 9.9-1.1 that would give you 8.8

Answer 26

The digits have to be distinct

Answer 27

exactly and the all have to be different

Answer 28

@loading... do you have any tips

Answer 29

Maximize a.b and minimize c.d

Answer 30

Yes^ find the maximum possible value of a.b and minimum value for c.d and subtract :~)