1)
for i in range(100, -4, -4):
print(i)

2)
a = 1
b = 1.2
for i in range (9):
c = a * b
print(c)
b = round(b + 0.2, 1)

3)
x = 1000
for i in range(1000, 9999):
x += 1
print(x)

#4-5 делал с помощью интернета, не понимаю как сделать.
4)
x = 1000
for i in range(1000, 9999 + 1):
x = list(str(i))
if len(x) == len(set(x)):
if "6" not in x and "5" not in x:
print(i)

5)
for i in range(10201, 100000, 2):
    if i // 100 % 2 == 1 and sum(int(digit) for digit in str(i)) % 4 == 0:
        print(i)

6)
for i in range(1000, 10000):
    if '3' in str(i):
        print(i)

7)
for i in range(100, 1000):
    a = i // 100
    b = (i % 100) // 10
    c = i % 10
    if i == a**3 + b**3 + c**3:
        print(i)

8)
с = 0
for a in range(1, 10):
    for b in range(0, 10):
        for c in range(0, 10):
            for d in range(0, 10):
                abcd = 1000 * a + 100 * b + 10 * c + d
                if abcd == 600 * (a + b + c + d):
                    с += 1
                    print(с)

9)
a = 5
for i in range(a):
    print("*" * (i + 1))

10)
a = int(input("кол-во строк:"))
for i in range(a):
    if i % 2 == 0:
        print("*******")
    else:
        print("****")