1. A
   0·16
2. B
   0·48
3. C
   0·58
4. D
   0·98

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1. A
   0·009
2. B
   0·016
3. C
   0·026
4. D
   0·047

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1. A
   42, 45
2. B
   41, 43
3. C
   43, 46
4. D
   40, 40

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1. A
   20
2. B
   21
3. C
   22·36
4. D
   24·70

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1. A
   7010
2. B
   7110
3. C
   7210
4. D
   7240

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1. A
   $\dfrac{20}{3}, \dfrac{35}{9}, -0\cdot5$
2. B
   $\dfrac{20}{3}, \dfrac{35}{9}, 0\cdot5$
3. C
   $\dfrac{35}{9}, \dfrac{20}{3}, -0\cdot5$
4. D
   $\dfrac{35}{9}, \dfrac{20}{3}, 0\cdot5$

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1. A
   3-7, 7-13, 13-17, 17-23, 23-27
2. B
   2·5-7·5, 7·5-12·5, 12·5-17·5, 17·5-22·5, 22·5-27·5
3. C
   1·5-8·5, 8·5-11·5, 11·5-18·5, 18·5-21·5, 21·5-28·5
4. D
   2-8, 8-12, 12-18, 18-22, 22-28

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1. A
   9, 16
2. B
   9, 4
3. C
   81, 16
4. D
   81, 4

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1. A
   $\{H\}$
2. B
   $\{TH\}$
3. C
   $\{T, HT, HHT, HHHT, \ldots\}$
4. D
   $\{H, TH, TTH, TTTH, \ldots\}$

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1. A
   4
2. B
   5
3. C
   6
4. D
   7

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1. A
   $\dfrac{5}{12}$
2. B
   $\dfrac{1}{2}$
3. C
   $\dfrac{7}{12}$
4. D
   $\dfrac{2}{3}$

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1. A
   $\dfrac{1}{8}$
2. B
   $\dfrac{3}{8}$
3. C
   $\dfrac{1}{12}$
4. D
   $\dfrac{1}{4}$

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1. A
   $\dfrac{2}{9}$
2. B
   $\dfrac{1}{3}$
3. C
   $\dfrac{4}{9}$
4. D
   $\dfrac{5}{9}$

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1. A
   1 only
2. B
   2 only
3. C
   Both 1 and 2
4. D
   Neither 1 nor 2

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1. A
   $\dfrac{5}{216}$
2. B
   $\dfrac{25}{216}$
3. C
   $\dfrac{125}{216}$
4. D
   $\dfrac{175}{216}$

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1. A
   50, 10
2. B
   50, 15
3. C
   55, 10
4. D
   55, 15

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1. A
   25
2. B
   40
3. C
   75
4. D
   115

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1. A
   $\dfrac{124}{3}$
2. B
   $\dfrac{148}{3}$
3. C
   $\dfrac{248}{3}$
4. D
   $\dfrac{124}{9}$

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1. A
   2·5v km/hr
2. B
   2·4v km/hr
3. C
   2·2v km/hr
4. D
   2·1v km/hr

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1. A
   75 and 75
2. B
   50 and 100
3. C
   70 and 80
4. D
   100 and 50

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1. A
   A is hermitian
2. B
   A is skew-hermitian
3. C
   $(\bar{A})^T + A$ is hermitian
4. D
   $(\bar{A})^T + A$ is skew-hermitian

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1. A
   180
2. B
   120
3. C
   90
4. D
   72

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1. A
   32
2. B
   64
3. C
   2048
4. D
   4096

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1. A
   18
2. B
   25
3. C
   10
4. D
   12

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1. A
   Only one
2. B
   Only two
3. C
   Only four
4. D
   Infinite

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