Several Logs Are Stored in a Pile with 18 Logs

question 20

Multiple Choice

Several logs are stored in a pile with 18 logs on the bottom layer, 17 on the second layer, 16 on the third layer, and so on. If the top layer has one log, how many logs are in the pile?

• A)162
• B)171
• C)153
• D)170
• E)none of the above

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