Answers

1. Answer:

   A 15:30 which is also equal to 1:2

   B 5:25 which is also equal to 1:5

   C 10:20 which is also equal to 1:2

   Step-by-step explanation:

   the perfect squares are 1,4,9,16,25

   list of prime numbers until 30 are 2, 3, 5, 7, 11, 13, 17, 19, 23, 29

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2. A.) odds to evens; 1:2
   B,) perfect squares to non perfect squares: 1:5
   C.) primes to composites; 1:2

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