Answer:
=MAX(A1:A20)
Step-by-step explanation:
The question clearly explains that we have 20 numbers stored in column A from A1 to A20. Hence our range is A1: A20, and we are required to find the largest number out of these 20. The solution seems to be straight forward. You need to type = in any cell where you want to show the largest number. Now select the MAX from the drop-down, and enter the range A1: A20 inside the parenthesis. Thus, we get the formula =MAX(A1: A20), which is what we need. As the formula will be completed, and we press enter, the largest number will be printed in that cell.