For whole numbers are each rounded up to the nearest 10.The sum of the four rounded numbers is 90.What is the maximum possible sum of the original 4 numbers?

Question

Help meeee I've tried everything and i don't know what to do!

Answer 1

well, 10 + 20 + 30 = 60

and, 60 + 30 = 90

So, the numbers could be 9 + 19 + 29 + 29 = 86

or, if they must differ from each other, then,

9 + 19 + 29 + 28 = 85