Rick astley becoming genius (you solve)

Rick astley becoming genius you solve; 0x0; 10x10; 99x99; What’s the square root of 625; 10x10 rubik’s cube; 5 to the power of 10; How to rickroll rick astley; 555% of 5555; The fact that number percentage of another number is the times like the real answer divided by 100; Everything in calculus; The Riemann Hypothesis (hardest math problem); How to outsmart Albert Einstein