Fractions

Problem 1. In which group are the correct fractions?

   

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Problem 2. The fraction a / 7 is correct, if a is

2; 5; 7;     1; 8; 3;     0; 1; 5;     4; 9; 12.

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Problem 3. The fraction 32/11 presented as a mixed number is

               

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Problem 4. The number  is equal to:

79/7     71/8     79/8     24/8

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Problem 5. Which of the fractions below is equal to 7/8 

14/24     21/24     35/48     21/32    

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Problem 6. Which group of the fractions below can be put under 40 as a common denominator:

1/2; 3/4; 5/7     5/7; 1/8; 3/4     1/2; 3/4; 1/8     3/4; 1/12; 1/8

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Problem 7. The fraction 24/72 equals to:

12/36      8/24      1/3      1/9     

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Problem 8. After calculating the expression  the result is:
5/2      3/5      4/15      16/60