Question

11111111, 111111111times ?​

Answer 1

Answer:

12345678987654321 .right

Answer 2

Answer:

I don't know what is it....... But that for you

Step-by-step explanation:

Which number multiplied by itself will give the output as 12345678987654321 ? what we observe is that the square of the number follows a pattern: 2 1's gives 121. 3 1's gives 12321. so to get 12345678987654321 we need to get square of 9 1's(111,111,111).