Question 21
There is a balance and a set of weights of 1 kg, 3 kg, 9 kg and 27 kg. How many different masses can this set measure?
Source glossary (English–Vietnamese): Balance: cái cân; A group of weights: một hộp các quả cân; Consisted: bao gồm; Measure: cân.
Editorial clarification: weights may be placed on either pan of the balance, and we count distinct positive whole-kilogram masses.
Source glossary (English–Vietnamese): Balance: cái cân; A group of weights: một hộp các quả cân; Consisted: bao gồm; Measure: cân.
Editorial clarification: weights may be placed on either pan of the balance, and we count distinct positive whole-kilogram masses.