Question 24
The diagram shows a beam balance. By placing standard weights and the object to be measured at the ends of the beam, it can measure the weight of an object. What is the minimum number of standard weights required to weigh any object from 1 to 40 kg, given that the standard weights and the object can have only whole number weights? Note: the diagram shows that the weight of the object is 2 kg; 2 kg is a standard weight.
