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If N is the sum of all digits used in writing all the numbers from 1 Tu thousand then the last digit of N is

Dilli PRASAD , 7 Years ago
Grade 12th pass
anser 1 Answers
Saurabh Koranglekar

Last Activity: 6 Years ago

sum=
(1+1000)1000/2

0 last digit

it uses formula (a +An)*(n/2)

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