~ BALANCE SCALE QUESTION - PLEASE HELP! ~

[joycezhu]

Please help with this problem- I thought the answer was 3, but the answer 2 was in the lecture.

There are 9 apparently identical balls, except that one is heavier than the other 8. What is the smallest number of balance scale weighings required to ensure identification of the “odd” ball? (Mathcounts)

[yongcheng3315]

Please help with this problem- I thought the answer was 3, but the answer 2 was in the lecture.

There are 9 apparently identical balls, except that one is heavier than the other 8. What is the smallest number of balance scale weighings required to ensure identification of the “odd” ball? (Mathcounts)

Divided them the way described in the lecture and do again. I am sure you will get it.