How are all of these numbers alike? 3,5,7,11,13

-- They're all odd numbers.
-- They're all prime numbers.
-- They're all positive numbers.
-- They're all less than 14.
-- They're all real, rational, whole numbers, natural numbers, and integers.
-- None of them is more than 10 away from any other one.

They are all odd numbers.

Explanation: Because even numbers like 2 and 4 are even because with even numbers you add the same 2 numbers like 1+1=2 and 2+2=4.

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The answer is option c.