10thpentagonalnumber

<-- Enter pentagonal number statement
  

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Calculate pentagonal number 10

The formula for pentagonal number n is as follows

Pn  =	n(3n - 1)
	2

Given n = 10, we have:

P10  =	10(3(10) - 1)
	2

P10  =	10(30 - 1)
	2

P10  =	10(29)
	2

P10  =	290
	2

P₁₀ = 145

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