Melody

I think that is what I already assumed.

You have 1000 people. 

you know 2 are sick.

You must find them in the quickest possible way.

You can test up to 32 people on mass and if anyone in the sample is positive for illness then you will get a positive result.

I'm pleased :)

You are very welcome.  

Please show me what you can do for yourself.

I mean expand ABC base 7 so that it is in base10

and expand CBA base 11 so that it is in base 10

then put the 2 equal to one another.

I organised it to get B in terms of A and C

Then I used a small amount of trial and error to find the answer that worked.

You will also need to think about what possibilities are there.  

What possible numbers can A be?

What possible numbers can B be?

What possible numbers can C be?

Will A be bigger or will C be bigger?

I have done this question and there are only 2 solutions.  Obviously one is bigger than the other.

What does v stand for?

Here is a possibility but you have not given me enough information to graph it properly.

I did tell you the formula.

V = Area of the circle * h

The area of a circle is so easy to find on the internet that I would be insulting your intelligence if I gave it to you.

Just google  "area of a circle"  and you will find it straight away.

It will have 8^5 zeros plus a 1 at the front

that is 32768+1 = 32769 digits

Think about it 

(the numbers on the left are in base 10 and the numbers on the right are in the given base)

10^4 = 10000 base 10

5^2 = 100 base 5

7^6 = 1000000 base 7

3^2 = 100 base 3