BEBRAS 2017 Grade 3-4 Round 2 Ext Question 12

Benno makes Schoggimousse for the family and needs five eggs of equal weight. Of six eggs, five weigh the same and one is heavier. A balance scale shows only which side is heavier or whether they balance; several eggs may be placed on a pan.



What is the fewest weighings that guarantees finding the heavier egg?