perplexus.info :: Numbers : Terminating in Eight 8s

Terminating in Eight 8s (Posted on 2023-06-20)

Determine the minimum value of a positive base ten integer N, such that each of the last eight digits of N³ is 8 but the ninth digit from the right in N³ is NOT 8.

Submitted by K Sengupta

Rating: 5.0000 (1 votes)

Solution: (Hide)

The required value for N is 11576942, since:
N^3 = 1551606436464188888888
For an explanation, refer to the solution submitted by Larry in this location.

Comments: ( You must be logged in to post comments.)

Subject	Author	Date
computer solution	Charlie	2023-06-20 09:26:16
Solution	Larry	2023-06-20 09:07:20

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