Advanced English quiz

If x^2 − 5x + 6 = 0, find the sum of the roots divided by the product of the roots.

(final answer by numbers)

A 3-digit number is divisible by 9. If its hundreds digit is 7 and the tens digit is 4, what is the smallest possible unit digit?

(final answer by numbers)

The ratio of boys to girls in a class is 3:2. If 6 boys leave and 4 girls join, the ratio becomes 5:4. Find the original number of students.

(final answer by numbers)

What is the smallest positive integer that has exactly 6 divisors?

(final answer by numbers)

Calculate the area of a triangle with vertices at (0,0), (4,0), and (0,3).

(final answer by numbers)

Which planet has the shortest day in the solar system?

What chemical reaction occurs when vinegar mixes with baking soda?

(final answer by chemical equation)

Why do some objects float in water?

What is the main function of mitochondria in a cell?

Which gas is responsible for the greenhouse effect?

(Write both name and chemical equation)