def divideBy(n, lst):
    result = []
    for ele in lst:
        if ele != 0:
            result.append(n / ele)
    return result

def divideBy2(n, lst):
    return [n / ele for ele in lst if ele != 0]

def positiveOnly(lst):
    return [n for n in lst if n > 0]

def double(lst):
    return [n*2 for n in lst]

def findBiggest(lst):
    biggest = lst[0]
    for i in range(1, len(lst)):
        if lst[i] > biggest:
            biggest = lst[i]
    return biggest

def addEmUp(lst):
    total = 0
    for ele in lst:
        total += ele
    return total