my name is richie i have two questions and they are:
Please show me how you solved these problems thank you! Hi Richie,For problem 1 notice that 20^{3} = 8000 so the middle prime is probably slightly smaller than 20. For problem 2 the lcm of a and b is 144 = 2^{4} x 3^{2}. Thus a = 2^{s} x 3^{t} and b = 2^{u} x 3^{v} for some integers s, t, u and v. Since a>or=2, either s is not zero or t is not zero. What does the fact that a and b are relatively prime tell you about s, t, u and v? Cheers,Penny
