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The above shows the first 4 pentagonal numbers, namely 1, 5, 12, 22.

How many points need to be added to the 36^\text{th}36th pentagonal number to get the 

37th pentagonal number?

 

 Jul 3, 2020
 #1
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I'm not sure if I understand your question!  The 37th pentagonal number is=2035. The 36th pentagonal number is =1926. So: the 37th - 36th =2035 - 1926 = 109 "points" are to be added to the 36th number to get the 37th number ?? Is that what you wanted?

 Jul 3, 2020

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