Question

Question: 520 logs are stacked in the following manner : 20 logs in the bottom row. 2 logs less in the next row, 2 logs less in the row next to it and so on. In how many rows are the 520 logs placed (find n)? How many logs are in the top row (find an for n as the no of rows)?
Answer : Number of rows = 20; Number of logs in top row = 7 (not sure if this answer is legit, obtained from a non-trustable source)
Your Objective : Obtain the answer Step wise (the answer does not need to match with the provided answers 20 and 7.
Caution : Any illogical answer will be reported, so answer wisely. If you don't know the answer, then just leave or try but not answer any wrong answer of irrelevant answer; it's a humble request.
Thank You.

Answer 1

Answer:

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