Question

what is the sum of the digits in 1+11+111+------+111111111​

Answer 1

Answer:

1+11+111+1111+11111=12345 and so on.. 111001 is your answer. For any number of the same pattern you can use answer = x × 12345 in this case x=1. So we can say that answer is 1 × 12345 which is equal to 12345

Step-by-step explanation:

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Answer 2

1+11=12

1+11+111=123

So,

1+11+111+...+111111111=123456789