Puzzle

Puzzle: Cheryl’s birthday

This is a logic puzzle for 5th grade students in Singapore, originally posted by Kennethjianwen in Facebook. One of my friends re-post the picture and it appeared in my news feed and it got my attention. In case you read this post in a device

By Robert Setiadi|2015-04-13T19:05:47+10:0013 Apr 2015|Puzzle|8 Comments

Puzzle: 12 stones with 1 anomaly, maximum 3 weighings

Puzzle Question: There are 12 stones with identical shape and size. 11 stones have the same weight, 1 stone has different weight and we don’t know which one. Let's call this special stone as "the anomaly". This scale will not show us how many kg