Final answer:
The number that has a repeating decimal form is √15.
Step-by-step explanation:
A repeating decimal is a decimal representation of a rational number where the digits after the decimal point repeat in a pattern. Out of the given options, only √15 is a non-repeating decimal. The square root of 15 is an irrational number and cannot be expressed as a terminating or repeating decimal. Therefore, the correct answer is A. √15.
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