Concatenating two consecutive integers
183 and 184
we get a six-digit number
183184, equalling
square of 428.List similar pairs, below
500,000 (final product).
How about the same task with a pair of a consecutve numbers
in a decreasing order?
Please provide a similar list (same constraints).
It was relatively easy to use Google Sheets to go beyond the boundaries of the problem, so I did. I also allowed leading zeros, which isn't strictly concatenating.
Two digits, descending:
91^2=8281
Three digits, ascending:
155^2=024025
274^2=075076
428^2=183184
573^2=328329
727^2=528529
846^2=715716
Four digits, ascending
2191^2=04800481
7810^2=60996100
Four digits, descending
922^2=00850084
9079^2=82428241
9901^2=98029801
|
|
Posted by Jer
on 2021-08-19 09:50:15 |
Solution +
