# Thread: Weighing Problem - paraphrased: There are 10 bags of gold coins...

1. ## Weighing Problem - paraphrased: There are 10 bags of gold coins...

There are 10 bags of gold coins.

Each bag contains 1000 identical (looks) coins.

8000 coins in 8 bags - each coin weighs 10 gms.

In two (2) other bags, there are 2000 coins each weighing 9 gms.

We have an electronic balance that can weigh upto 100 kg very accurately.

How would you identify both the bags containing coins weighing 9 gms, by using the balance only once?

2. Hint: 1,2,4,8,.....

how do I delete this thread?

4. Originally Posted by Djack94
how do I delete this thread?
Why do you want to delete it?

5. Originally Posted by Djack94
There are 10 bags of gold coins.

Each bag contains 1000 identical (looks) coins.

8000 coins in 8 bags - each coin weighs 10 gms.

In two (2) other bags, there are 2000 coins each weighing 9 gms.

We have an electronic balance that can weigh upto 100 kg very accurately.

How would you identify both the bags containing coins weighing 9 gms, by using the balance only once?
Another hint:

1, 4, 9, 16, 25........81, 100.

Edit: No that does not work .... 42 + 72 = 12 + 82