Excel function MIN
The MIN function returns the lowest value in a series of numbers.
1st method
Select the MIN function. In the "Number1" field, enter a data range and then click OK.

The lowest value will be returned.

2nd method
Select the MIN function. Enter one cell in each box (up to 255 boxes will be added automatically) and then click OK.

The lowest value will be returned.

The 2nd method is generally used when the numbers are dispersed on the sheet.