Question: is putnam harder than imo?
Answer: Putnam is harder. ... Putnam has twice more problems than IMO has to be solved in 2/3 of IMO's time (3 hours compared to 4.5). It's worth noting that first 2 problems of each contest (there are 2 contests each with 6 problems) are relatively easier than the easiest problem at IMO not taking too much time.