Question

what is the missing number of 11 21 31 41

Answer 1

Hello Mate,

I think that the missing number is 51

Hope that my answer is correct

Answer 2

11 (+10)=21. 21 (+10) =31. 31 (+10) = 41

Now there is a gap of 10 between each given number.

Hence,

Next no. will be,

41 (+10).

$\mathfrak {Answer =51}$