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Yes, there are triangular numbers that end in 000. For example, 2,001,000 and 7,998,000.

You can find a triangular number T that ends in 000 using the formula

T = (1/2)(k)(k+1),

where k is equal to any of the following:





and n is any positive integer.

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โˆ™ 2013-09-18 02:34:21
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Q: Are there any triangular numbers that end in 000?
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