Simon has 20% more legos than Bruce, who has 20 more than Kent. If Kent has 40 legos, how many does Simon have? Let's think first. Chain of thought:
Bruce has 20 more legos than Kent who has 40 so Bruce has 20 + 40 = 60 legos. Simon has 20% more legos than Bruce who has 60 legos so that's .20 * 60 = 12 more legos. 20% more is 12 legos and Bruce has 60 so Simon has 12 + 60 = 72 legos.
Therefore, the answer is 72.