A Stack of Poles Has 21 Poles in the Bottom

question 216

Multiple Choice

A stack of poles has 21 poles in the bottom row, 20 poles in the next row, and so on, with 10 poles in the top row. How many poles are there in the stack?

• A) 176
• B) 186
• C) 196
• D) 160

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Definitions:

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Psychoactive Drug

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