1. A
   $-1$
2. B
   $0$
3. C
   $1$
4. D
   $2$

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1. A
   $x=0$
2. B
   $x=1$
3. C
   $x=\omega$
4. D
   $x=\omega^2$

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1. A
   $-1$
2. B
   $0$
3. C
   $1$
4. D
   $\sqrt{3}$

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1. A
   $81$
2. B
   $85$
3. C
   $87$
4. D
   $90$

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1. A
   $360$
2. B
   $300$
3. C
   $288$
4. D
   $240$

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1. A
   $0$
2. B
   $\frac{\pi}{2}$
3. C
   $\pi$
4. D
   $2\pi$

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1. A
   $6$
2. B
   $7$
3. C
   $8$
4. D
   $10$

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1. A
   $6$
2. B
   $9$
3. C
   $12$
4. D
   $24$

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1. A
   $3$
2. B
   $5$
3. C
   $6$
4. D
   $9$

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1. A
   $2$
2. B
   $3$
3. C
   $4$
4. D
   $6$

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1. A
   Third
2. B
   Fourth
3. C
   Fifth
4. D
   Ninth

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1. A
   $11$
2. B
   $13$
3. C
   $15$
4. D
   $17$

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1. A
   $-2$
2. B
   $-1$
3. C
   $0$
4. D
   $1$

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1. A
   $0$
2. B
   $1$
3. C
   $4$
4. D
   $14$

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1. A
   None
2. B
   One
3. C
   Two
4. D
   All three

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1. A
   $\begin{pmatrix} -1 & 0 \\ 0 & -1 \end{pmatrix}$
2. B
   $\begin{pmatrix} 1 & 1 \\ 1 & 1 \end{pmatrix}$
3. C
   $\begin{pmatrix} -1 & 0 \\ 0 & 1 \end{pmatrix}$
4. D
   $\begin{pmatrix} 1 & 0 \\ 0 & 1 \end{pmatrix}$

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1. A
   $-5I_3$
2. B
   $-I_3$
3. C
   $I_3$
4. D
   $5I_3$

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1. A
   $n$
2. B
   $2n$
3. C
   $3n$
4. D
   $4n$

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1. A
   $20$
2. B
   $22$
3. C
   $41$
4. D
   $42$

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1. A
   Null matrix
2. B
   Identity matrix
3. C
   $A$
4. D
   $-A$

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