Assume that you have a block weighing 40 kg and have tools to divide it as you want. Now, your task is to cut that block into 4 pieces such that only using those 4 pieces and a two-way balancing pan, you can measure any weight from 1 kg to 40 kg ? (You should be able to measure any weight like 1 kg, 2 kg, 3 kg upto 40 kg ).