Find the square root of 225.

Appeared in: RML MAINS 2025

Explanation

The square root of a number is a value that, when multiplied by itself, equals the original number.
To solve this, we are looking for a number 'x' where x * x = 225.
By testing the options, we find that 15 * 15 = 225.
Therefore, 15 is the square root of 225.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Calculating the square root of a perfect square as background academic context rather than a clinical decision trigger.
This question tests foundational mathematical skills, which are essential for various calculations in nursing.
Accurate calculation is critical for tasks such as medication dosage calculation, IV drip rate regulation, and interpreting patient data, where a simple math error can have serious consequences for patient safety.
What if the number was not a perfect square, like 230? The answer would be an irrational number (approximately 15.16), and in a clinical setting, you would use a calculator for such computations to ensure accuracy.

How to Approach the Question

First, understand the question. It asks for the 'square root' of 225, which means finding a number that, when multiplied by itself, equals 225.
A straightforward approach for multiple-choice questions is to test each option. Multiply each option by itself and see which one results in 225.
For option A: 10 × 10 = 100.
For option B: 12 × 12 = 144.
For option C: 14 × 14 = 196.
For option D: 15 × 15 = 225. This matches the number in the question.

Concept Tested & Keywords

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