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Q: Find the LCM by prime factorisation of 18 and 30. 18 और 30 के अभाज्य गुणनखंड द्वारा LCM ज्ञात कीजिए।
  • A. 75
  • B. 90
  • C. 60
  • D. 120
Correct Answer: Option B - प्रश्नानुसार, 18 = 2 × 3 × 3 30 = 2 × 3 × 5 L.C.M. = 2 × 3 × 3 × 5 = 90
B. प्रश्नानुसार, 18 = 2 × 3 × 3 30 = 2 × 3 × 5 L.C.M. = 2 × 3 × 3 × 5 = 90

Explanations:

प्रश्नानुसार, 18 = 2 × 3 × 3 30 = 2 × 3 × 5 L.C.M. = 2 × 3 × 3 × 5 = 90