It's almost the same function but one is working and the other no

Question

my problem is that these two functions (in my opinion the same) one works and the other does not, any suggestions?

fr = open("numeri.txt", "r")

def numMax(file):
    i = 1
    maxNum = 0
    for n in file:
        n = int(n)
        if i == 1 or n > maxNum:
            maxNum = n
        i += 1
    return maxNum

def numMin(file):
    i = 1
    minNum = 0
    for n in file:
        n = int(n)
        if i == 1 or n < minNum:
            minNum = n
        i += 1
    return minNum
    
print("The max is", numMax(fr))
print("The min is", numMin(fr))

fr.close()

The file contents: 20 47 174 29 117 29 29 62 55 71 89 177 27 178 96 -8 116 132 188 63 129