Math Is Fun Forum

anonimnystefy

Real Member

From: Harlan's World

Registered: 2011-05-23

Posts: 16,049

Re: Weighings - A sack of flour

4300:

Change the last line of the method for 4400 to:

For 4200 we just take a 300 instead of the 200 in the new last line.

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“Here lies the reader who will never open this book. He is forever dead.
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.

anonimnystefy

Real Member

From: Harlan's World

Registered: 2011-05-23

Posts: 16,049

Re: Weighings - A sack of flour

This is the end!!!

We divide a 10kg sack into 5000g. Yhen we take one of those 5000 g bags and treat it as it were a 10kg bag i.e. we takw flour from it now.

We do the method for 1100 (900) thus getting in the 5000 g bag a remainder of 3900 (4100) g.

The probability of the costumer being served is 100%. Now that is a good deal!

Two notes:

1) The two methods-for 1100 and for 900-both take 2 measurings.

2)We put back any flour not in the 900 (1100) g bag back into the 5000g bag.

Last edited by anonimnystefy (2012-04-15 09:28:45)

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“Here lies the reader who will never open this book. He is forever dead.
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.

Bob

Administrator

Registered: 2010-06-20

Posts: 10,621

Re: Weighings - A sack of flour

hi Stefy,

That is excellent!  I was hoping it would come to that.  Well done for your persistence!

Now let's take a break from flour.

I have been typing the non calculator quadratic thing.  It's been a struggle of multiple {{{

I hope it is worth it.

Bob

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Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

anonimnystefy

Real Member

From: Harlan's World

Registered: 2011-05-23

Posts: 16,049

Re: Weighings - A sack of flour

Hi bob

Do you use Codecogs like it was recommended to you many times before?

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“Here lies the reader who will never open this book. He is forever dead.
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.

anonimnystefy

Real Member

From: Harlan's World

Registered: 2011-05-23

Posts: 16,049

Re: Weighings - A sack of flour

Hi bob

Everything falls to the water now. An older friend of mine just noticed that I used the weights as if they were bags of flour!

I will tomorrow try to redo everything!

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“Here lies the reader who will never open this book. He is forever dead.
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.

anna_gg

Member

Registered: 2012-01-10

Posts: 232

Re: Weighings - A sack of flour

I had done the same mistake when I first fell onto this puzzle. I don't think we (=you) are completely the wrong way. I think the only constraint is that we cannot use each bag (weight) more than once in the same weighing.

anna_gg

Member

Registered: 2012-01-10

Posts: 232

Re: Weighings - A sack of flour

Funny thing, I posted this puzzle two months ago and nobody had replied till yesterday! Once I dropped my first line, this triggered 56 posts! Thank you guys!!!

anonimnystefy

Real Member

From: Harlan's World

Registered: 2011-05-23

Posts: 16,049

Re: Weighings - A sack of flour

Wow, it's beenmore than a year.

Well, I stumbled upon this thread and remembered we never resolved it to the end. I tried redoing and for now I have everything up to 3300 and I also have 3500 (and of course, the 10000's complement of all of these ).

EDIT: I now everything except 3400, 3600 and their complements.

Last edited by anonimnystefy (2013-05-14 11:20:14)

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“Here lies the reader who will never open this book. He is forever dead.
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.