Mean proportional: square root of the product, or a term from it

1. A.
   42
2. B.
   28
3. C.
   21
4. D.
   14

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1. A.
   225
2. B.
   205
3. C.
   215
4. D.
   235

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1. A.
   a = 24; c = 374
2. B.
   a = 32; c = 288
3. C.
   a = 48; c = 168
4. D.
   a = 16; c = 586

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1. A.
   $(a+b)^2 (a-b)^2$
2. B.
   $(a+b)^2(a-b)$
3. C.
   $(a+b) (a-b)^2$
4. D.
   $a^2-b^2$

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1. A.
   $\frac{12}{a^2}$
2. B.
   $12a^2$
3. C.
   $\frac{12}{a}$
4. D.
   $12a$

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1. A.
   21
2. B.
   36
3. C.
   49
4. D.
   42

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1. A.
   13 : 8
2. B.
   11 : 8
3. C.
   11 : 13
4. D.
   13 : 12

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1. A.
   38.3
2. B.
   30.4
3. C.
   35
4. D.
   32.3

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1. A.
   16
2. B.
   8
3. C.
   12
4. D.
   6

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1. A.
   1.44
2. B.
   1.69
3. C.
   1.96
4. D.
   1.21

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1. A.
   55
2. B.
   70
3. C.
   65
4. D.
   60

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1. A.
   $\frac{1}{100a^2}$
2. B.
   $\frac{1}{25a^4}$
3. C.
   $\frac{1}{25a^2}$
4. D.
   $\frac{1}{100a^4}$

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1. A.
   60
2. B.
   40
3. C.
   50
4. D.
   45

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1. A.
   3, 28
2. B.
   24, 6
3. C.
   3, 38
4. D.
   24, 16

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