Maths Exam

1. Express the following ratios in their simplest forms:

1. Ratio 0.630 : 0.0600
Correct Answer
21:2
2. Ratio: $$\frac{11}{1} : \frac{6}{12}$$
Correct Answer
22:1
3. Ratio 22.0 : 44.0
Correct Answer
5:10

2. Write the following as percentages

1. Number: 0.41
Correct Answer
41 %
2. Number: $$\frac{3}{4}$$
Correct Answer
75.0 %
3. Number: 1.6
Correct Answer
160 %

3. Write the following as a fraction

$$ 60.00 \%$$
Correct Answer
$$\frac{3}{5}$$

4. Logs

Solve the following for x: $$-5\ln\left(x\right) + \ln\left({\left(4x\right)}^{3}\right) = \ln\left(x\right) + 5$$
Correct Answer
$$ x = {\left(\frac{\exp\left(5\right)}{64}\right)}^{\frac{-1}{3}} $$

5. Powers

1. Please simplify the following expression: $$ {x}^{6}{x}^{-2} $$
Correct Answer
$${x}^{4} $$
2. Please simplify the following expression: $$ {x}^{\frac{-1}{3}}{x}^{\frac{-3}{3}} $$
Correct Answer
$$\frac{{x}^{\frac{-1}{3}}}{x} $$
3. Please simplify the following expression: $$ {\left({x}^{-3}\right)}^{-6} $$
Correct Answer
$$ {x}^{18} $$
4. Please simplify the following expression: $$ \frac{{\left({x}^{2}\right)}^{5}{y}^{2}}{{y}^{-2}} $$
Correct Answer
$$ {x}^{10}{y}^{4} $$

6. Express the following ratios in their simplest forms:

1. Ratio 16 : 40
Correct Answer
2:5
2. Ratio: $$\frac{4}{1} : \frac{4}{1}$$
Correct Answer
1:1
3. Ratio 11.0 : 22.0
Correct Answer
5:10

7. Write the following as percentages

1. Number: 0.74
Correct Answer
74 %
2. Number: $$\frac{2}{5}$$
Correct Answer
40.0 %
3. Number: 1.6
Correct Answer
160 %

8. Write the following as a fraction

$$ 80.00 \%$$
Correct Answer
$$\frac{4}{5}$$

9. Logs

Solve the following for x: $$3\ln\left(3x\right) + -5\ln\left(x\right) = \ln\left(x\right) + 5$$
Correct Answer
$$ x = {\left(\frac{\exp\left(5\right)}{27}\right)}^{\frac{-1}{3}} $$

10. Powers

1. Please simplify the following expression: $$ {x}^{3}{x}^{-4} $$
Correct Answer
$$\frac{1}{x} $$
2. Please simplify the following expression: $$ \frac{{x}^{-2}}{{x}^{1}} $$
Correct Answer
$$\frac{1}{{x}^{3}} $$
3. Please simplify the following expression: $$ {\left({x}^{-4}\right)}^{2} $$
Correct Answer
$$ {x}^{-8} $$
4. Please simplify the following expression: $$ \frac{{\left({x}^{6}\right)}^{1}{y}^{5}}{{y}^{-3}} $$
Correct Answer
$$ {x}^{6}{y}^{8} $$


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