Adam’s son John and Adam’s grandpa Joe went to the park. Can you tell me what is relationship of Joe and John?

Joe is John's grandfather. No that is wrong Joe is John's great grandfather

Adam’s daughter Mary and Adam’s grandma Joan went to the park. Can you tell me what is relationship of Mary and Joan?

Joan is Mary's grandmother. No that is wrong Joan is Mary's great grandmother That is correct.

David lost his mother last fall to cancer, where is his father now?

David's father is deceased. No. David's father is alive.

What month did david's mother die?

David's mother died in September.