Mathematics

Fluidité · Pack B

Exponents and Indices

Répondez à chaque question. Montrez les calculs si nécessaire.

Bronze
  1. Evaluate $3^{4}$.

  2. Evaluate $12^{0}$.

  3. Simplify $x^{5} \times x^{2}$.

  4. Simplify $\dfrac{x^{10}}{x^{4}}$.

  5. Simplify $(x^{4})^{3}$.

  6. Simplify $(5 x^{2})^2$.

  7. Write $5^{-2}$ as a fraction.

  8. Write $45000$ in standard form (scientific notation).

  9. Write $0.00007$ in standard form.

  10. Write $6.3 \times 10^{3}$ as an ordinary number.

Silver
  1. Simplify $2 x^{3} \times 5 x^{4}$.

  2. Simplify $\dfrac{18 x^{8}}{3 x^{2}}$.

  3. Simplify $\left(\dfrac{x^{7}}{x^{3}}\right)^{2}$.

  4. Simplify $x^{7} \times x^{-4}$.

  5. Write $\dfrac{1}{x^{6}}$ using a negative index.

  6. Calculate $(4 \times 10^{3}) \times (5 \times 10^{2})$, giving your answer in standard form.

  7. Calculate $\dfrac{9 \times 10^{5}}{3 \times 10^{2}}$ in standard form.

  8. Simplify $\dfrac{x^{6} \times x^{2}}{x^{5}}$.

  9. How many times larger is $6 \times 10^{8}$ than $2 \times 10^{4}$?

  10. Simplify $(-2 x^{3})^{3}$.

Gold
  1. Evaluate $81^{1/2}$.

  2. Evaluate $64^{1/3}$.

  3. Evaluate $27^{2/3}$.

  4. Evaluate $49^{-1/2}$.

  5. Simplify $\dfrac{(3 x^{2})^{3}}{x^{4}}$.

  6. Calculate $(4 \times 10^{6}) + (2 \times 10^{5})$ in standard form.

  7. Simplify $(27)^{-2/3}$.

  8. Solve $2^x = 128$.

  9. If $x = \dfrac{2}{3}$, evaluate $x^{3}$.

  10. Write $\sqrt[5]{x^{3}}$ using a fractional index.

Platinum
  1. Solve $2^{x+1} = 64$.

  2. Solve $3^{2x} = 729$.

  3. Simplify $\dfrac{(3 x^{2})^{2} \cdot x^{3}}{x^{5}}$.

  4. The mass of Earth is $6 \times 10^{24}$ kg and the mass of the Sun is $2 \times 10^{30}$ kg. How many times more massive is the Sun?

  5. Simplify $\dfrac{x^{4} \cdot y^{-3}}{x^{-2} \cdot y^{5}}$, expressing the answer with positive indices.

  6. Evaluate $(81)^{3/4}$.

  7. Light travels at $3 \times 10^8$ m/s. Calculate the distance light travels in $200$ seconds, in standard form.

  8. Solve $2^{x} \cdot 2^{x+1} = 128$.

  9. Simplify $\left(\dfrac{3x^{4}y^{5}}{x^{1}y^{2}}\right)^{2}$.

  10. Solve $x^{1/3} = 5$ for positive $x$.