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The perfect squares from 1 through 2500 inclusive, are printed in a sequence of digits 1491625.....2500  How many digits are in the sequence?

 Sep 3, 2018
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1 | 4 | 9 | 16 | 25 | 36 | 49 | 64 | 81 | 100 | 121 | 144 | 169 | 196 | 225 | 256 | 289 | 324 | 361 | 400 | 441 | 484 | 529 | 576 | 625 | 676 | 729 | 784 | 841 | 900 | 961 | 1024 | 1089 | 1156 | 1225 | 1296 | 1369 | 1444 | 1521 | 1600 | 1681 | 1764 | 1849 | 1936 | 2025 | 2116 | 2209 | 2304 | 2401 | 2500 (50 integers)


[3 + (6 x 2) + (22 x 3) + (19 x 4) ]=
[3 +   12     +  66         +  76         ]=157 digits

 Sep 3, 2018

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