72, 108 आणि 300 ने विभाज्य असलेली सर्वात लहान घन संख्या कोणती?

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RRB NTPC CBT 2 (Level-5) Official Paper (Held On: 12 June 2022 Shift 1)
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  1. 3375
  2. 27000
  3. 5400
  4. 21600

Answer (Detailed Solution Below)

Option 2 : 27000
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RRB NTPC CBT-I Official Paper (Held On: 4 Jan 2021 Shift 1)
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Detailed Solution

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दिलेले आहे:

ती संख्या 72, 108 आणि 300 ने विभाज्य असली पाहिजे.

वापरलेली संकल्पना:

सदर प्रकारच्या प्रश्नासाठी, आपण आवश्यक संख्या शोधण्यासाठी लसाविचा वापर करतो

गणना:

72 = 23 × 32

108 = 22 × 33

300 = 2× 3 × 52

लसावि = 23 × 33 × 52

⇒ 5400

आता ती संख्या एक घन संख्या आणि 5400 च्या पटीत असली पाहिजे.

अशाप्रकारे,

5400 × 2 = 10800 ही एक घन संख्या नाही.

5400 × 3 = 16200 ही एक घन संख्या नाही.

5400 × 5 = 27000 ही एक घन संख्या असून ती सर्वात लहान आहे.

∴ 72, 108 आणि 300 ने विभाज्य असलेली सर्वात लहान घन संख्या 27000 आहे.

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