WEIGHING SET

You will specify three weights to form a weighing set and you will take three of each weight. Your aim is to weigh all the integer weights from 1 to N using these nine weights in a two-tier balance scale.

What is the maximum number of N?

Notes:
• You can put weights on both sides of the scale.
• Each integer weight you weigh should be in balance.

Popularity: 64.6 %     Difficulty: 27.1 %