What do ergs regs and hammadas having in common?

What are the two factor numbers with the sum of 20 and the product of 91? What is the greatest common factor of 125and100? What is the noun for symmetrical? How much would 45 kilograms weigh on the moon? Is there such a thing as an irrational exponent? How many pounds are in 172 ounces? What is the surface area of the right prism given below? Can someone give you a formula to use on Excel to generate 6 number combinations using the numbers 1 to 49? What percent of 42 equals 48? What is a twenty faced geometrical shape? What is the sum of any number multiplied by its what equals 0? How do you know three to the power of six is not a prime number? What can you do with abacus? What is 59 over 100 in simple form? What is the next value of 1 I 2 L 3 F 4? Is 71 odd or even? What is the palidrome of 9.8? What are the advantages of single point service? What is 25 in exponent form? How many times greater is a square yard than a square foot?