Question

The least number which must be added to greatest 4 digit number

Answer 1

positive least number be 1. so add one wid 4

Answer 2

Question not clear but this is my guess ...:

The greatest four digit number is 9999

So according to the the question ,

The least number which must be added to the get 9999 is 0 because

9999 + 0 = 9999

Also another possibility is 9998+1=9999

But 0<1 , so the least number to be added to greatest four digit number is 0

Hope it helps u :)

Pls let me know if it is correct :)!