Which option is the best first check for identifying an irrational number in an exam?
Answer and explanation
Correct answer: Whether it becomes the square root of a perfect square
Step 1: In square-root questions first check whether the number inside is a perfect square. Step 2: A perfect square may give a rational square root while a non-perfect square often gives an irrational value. Step 3: Simplifying is the safest first step in identification questions.
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What is the correct answer to this question?
Whether it becomes the square root of a perfect square
Why is this the correct answer?
Step 1: In square-root questions first check whether the number inside is a perfect square. Step 2: A perfect square may give a rational square root while a non-perfect square often gives an irrational value. Step 3: Simplifying is the safest first step in identification questions.
Which subject and chapter does this question cover?
This is a Class 10 Mathematics question. Chapter: Real Numbers. Topic: Irrational numbers.
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