



 
Hi Gerry, If you are one of the golfers then on each round you play with 3 other golfers. Thus in the 4 rounds you play with at most $3 \times 4 = 12$ other golfers. Hence in the 4 rounds you can't play with each of the 15 others in your group. If you have 5 rounds you can achieve what you want. For 4 rounds take the schedule given and delete one of the days. That's the best you can do. Harley  


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