21) What is the equation for the volume of a sphere?
22) What is the sum of the first 20 multiples of 10?
23) What is the integral of 4x^3?
24) How many sides does a hexagon have?
25) What is the result of 2 to the power of 3?
26) What is the derivative of log(x)?
27) What is the equation for a circle with a radius of 2?
28) What is the probability of rolling a 6 on a single die roll?
29) What is the equation of a line with a slope of 4 and a y-intercept of -3?
30) How many degrees are in a right angle?