Maths Exam

1. Express the following ratios in their simplest forms:

1. Ratio 7 : 35
Correct Answer
1:5
2. Ratio: $$\frac{5}{7} : \frac{11}{11}$$
Correct Answer
5:7
3. Ratio 61.6 : 17.6
Correct Answer
7:2

2. Write the following as percentages

1. Number: 0.76
Correct Answer
76 %
2. Number: $$\frac{7}{3}$$
Correct Answer
233 %
3. Number: 1.5
Correct Answer
150 %

3. Write the following as a fraction

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

4. Logs

Solve the following for x: $$\ln\left({\left(6x\right)}^{-2}\right) + \ln\left({\left(2x\right)}^{6}\right) = \ln\left(x\right) + 6$$
Correct Answer
$$ x = {\left(\frac{9\exp\left(6\right)}{16}\right)}^{\frac{1}{3}} $$

5. Powers

1. Please simplify the following expression: $$ {x}^{-3}{x}^{5} $$
Correct Answer
$${x}^{2} $$
2. Please simplify the following expression: $$ {x}^{\frac{-1}{-1}}{x}^{\frac{-6}{-1}} $$
Correct Answer
$${x}^{7} $$
3. Please simplify the following expression: $$ {\left({x}^{-4}\right)}^{-6} $$
Correct Answer
$$ {x}^{24} $$
4. Please simplify the following expression: $$ \frac{{\left({x}^{-3}\right)}^{5}{y}^{3}}{{y}^{2}} $$
Correct Answer
$$ \frac{y}{{x}^{15}} $$

6. Express the following ratios in their simplest forms:

1. Ratio 12 : 18
Correct Answer
2:3
2. Ratio: $$\frac{3}{12} : \frac{7}{9}$$
Correct Answer
9:28
3. Ratio 8.80 : 44.0
Correct Answer
1:5

7. Write the following as percentages

1. Number: 0.091
Correct Answer
9.1 %
2. Number: $$\frac{7}{3}$$
Correct Answer
233 %
3. Number: 1.8
Correct Answer
180 %

8. Write the following as a fraction

$$ 14.29 \%$$
Correct Answer
$$\frac{1}{7}$$

9. Logs

Solve the following for x: $$5\ln\left(2x\right) + \ln\left(6x\right) = \ln\left(x\right) + -2$$
Correct Answer
$$ x = {\left(\frac{\exp\left(-2\right)}{192}\right)}^{\frac{1}{5}} $$

10. Powers

1. Please simplify the following expression: $$ {x}^{-1}{x}^{2} $$
Correct Answer
$$x $$
2. Please simplify the following expression: $$ {x}^{\frac{-2}{4}}{x}^{\frac{-1}{4}} $$
Correct Answer
$${x}^{\frac{-1}{2}}{x}^{\frac{-1}{4}} $$
3. Please simplify the following expression: $$ {\left({x}^{4}\right)}^{4} $$
Correct Answer
$$ {x}^{16} $$
4. Please simplify the following expression: $$ \frac{{\left({x}^{-3}\right)}^{-5}{y}^{-5}}{{y}^{-3}} $$
Correct Answer
$$ \frac{{x}^{15}}{{y}^{2}} $$


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