Question
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2.
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4.
Answer (Detailed Solution Below)
Option 3 : 21 / 21
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Detailed Solution
सही उत्तर 21 / 21 है।
Key Points
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prepsnap.in • Part -AQuestion:
Which of the following is NOT a prime number? / निम्न में से कौन-सी अभाज्य संख्या नहीं है?
1.
17 / 17
2.
19 / 19
3.
21 / 21
4.
23 / 23
Correct Answer: 21 / 21
21 = 3 × 7, so it is composite; the rest are prime. / 21 = 3 × 7, अतः यह भाज्य है; शेष अभाज्य हैं।
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