30 cows and 28 chickens

There are 30 cows in a field, and 28 chickens. How many didn’t? Check the answer here.

You start with 1000 then add 40

You start with 1000 then add 40 add another 1000 then add 30 add another 1000 then add 20 add one more 1000 then add 10 what is your answer? Check the answer here.