In python: def is_prime(x): if x == 1 or x == 0: return False if x == 2: return True for i in range(2,x): if x % i == 0: return False return True a = int(input("First number:")) b = int(input("Second number:")) primes = [] for i in range(a,b+1): if is_prime(i): primes.append(i) print(primes)

The unicycle will move exactly as far as the circumference of the wheel. To work out the circumference you need to calculate 2πr. In this case the radius, r, is 40 which is half of the diameter 80. 2×π×40 is 251.3274 The units are cm, so 251.33cm or 2.51m (to two decimal places)

Divide everything by 4: -1.25<X<3.25 So x has to be in that range (-1.25 to 3.25). You can draw this on an X axis on a graph.