A shopkeeper has four weighs and their sum is 40kg. By using the weighs he can calculate any weight from 1-40kg. Calculate the weight of all four weighs.
The weights of all four weighs are 1 kg, 3kg, 9 kg and 27 kg.
A shopkeeper has an unknown weight in his shop. To find out the weight, he first weighs 1 kg of rice, and then weighs 1 kg of rice and the unknown weight together. The combined weight of the rice and the unknown weight is 1.5 kg. Find the unknown weight (in grams).