\(यदि (D_3={x \in \mathbb{N}:x\) अभाज्य है और \(20<x<30}), तो (D_3) कौन सा है\)?
\(If (D_3={x \in \mathbb{N}:x\) is prime and \(20<x<30}), then what is (D_3)\)?
Explanation opens after your attempt
B. ({23,29})
Concept
Check natural numbers between (20) and (30).
Why this answer is correct
(23) and (29) are prime, while (21,25,27) are composite.
Exam Tip
When testing primality, check divisibility by small factors. चरण 1: (20) और (30) के बीच प्राकृतिक संख्याएँ जाँचें। चरण 2: (23) और (29) अभाज्य हैं, जबकि (21,25,27) भाज्य हैं। चरण 3: अभाज्य जाँचते समय छोटे गुणनखंडों से विभाज्यता देखें।
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