How would you find the heavy bottle?

Question

Given 10 identical bottles of identical pills (each bottle contain hundred of pills). Out of 10 bottles 9 have 1 gram of pills but 1 bottle has pills of weight of 1.1 gram. Given a measurement scale, how would you find the heavy bottle? You can use the scale only once.

Answer 1

1. Number the bottles
2. Take 10 pills from bottle number 1, 20 pills from 2, so on and 100 pills from 10- total of 550 pills
3. Weight all taken pills together- should be 550 grams, the deviation in grams will indicate the bottle number