Quiz Discussion

25 * 3.250 + 50.40 / 24.0 = ?

• 1]

  75

• 2]

  80

• 3]

  77

• 4]

  83

The expression $\frac{1}{{x - 1}} - \frac{1}{{x + 1}} - \frac{2}{{{x^2} + 1}} - \frac{4}{{{x^4} + 1}}$  is equal to = ?

• 1]

  $\frac{8}{{{x^8} + 1}}$

• 2]

  $\frac{8}{{{x^8} - 1}}$

• 3]

  $\frac{8}{{{x^7} - 1}}$

• 4]

  $\frac{8}{{{x^7} + 1}}$

A millionaire bought a lot of hats 1/4 of which were brown. The millionaire sold 2/3 of the including 4/5 of the brown hats. What fraction of the unsold hats were brown ?

• 1]

  1/60

• 2]

  1/15

• 3]

  3/20

• 4]

  3/5

• 5]

  3/4

Simplify : $\left[ {\left( {1 + \frac{1}{{10 + \frac{1}{{10}}}}} \right) \times \left( {1 + \frac{1}{{10 + \frac{1}{{10}}}}} \right) - \left( {1 - \frac{1}{{10 + \frac{1}{{10}}}}} \right) \times \left( {1 - \frac{1}{{10 + \frac{1}{{10}}}}} \right)} \right] \div \left[ {\left( {1 + \frac{1}{{10 + \frac{1}{{10}}}}} \right) + \left( {1 - \frac{1}{{10 + \frac{1}{{10}}}}} \right)} \right] = ?$

• 1]

  100/101

• 2]

  90/101

• 3]

  20/101

• 4]

  101/100

Simplify : $\sqrt {3 + \frac{{33}}{{64}}} \div \sqrt {9 + \frac{1}{7}} \times  2\sqrt {3\frac{1}{9}}$   = ?

• 1]

  45/256

• 2]

  $1\frac{{17}}{{28}}$

• 3]

  $4\frac{3}{8}$

• 4]

  $2\frac{3}{{16}}$