दोन संख्यांमधील दुप्पट फरक त्यांच्या बेरजेइतका असतो. जर एक संख्या 15 असेल तर दुसरी संख्या शोधा.

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  1. 15 किंवा 45
  2. 10 किंवा 30
  3. 5 किंवा 45
  4. 20 किंवा 35

Answer (Detailed Solution Below)

Option 3 : 5 किंवा 45
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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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संख्या x आणि y असू द्या

दिलेल्या डेटावरून, आम्हाला मिळते

⇒ 2 (x - y) = x + y

केस १

जेव्हा, x = 15

⇒ 2 (15 - y) = 15 + y

⇒ 30 - 2y = 15 + y

⇒ 15 = 3y

⇒ y = 5

केस 2

जेव्हा, y = 15

⇒ 2 (x - y) = x + y

⇒ 2 (x - 15) = x + 15

⇒ 2x - 30 = x + 15

⇒ x = 45

∴ दुसरी संख्या 5 किंवा 45 आहे

गोंधळाचे मुद्दे प्रश्नात दुसरी संख्या शोधण्यास सांगितले जाते आणि इतर संख्या 5 किंवा 45 असू शकतात.

पहिल्या क्रमांकाबद्दल विचारले जात नाही म्हणून 15 आणि 45 हे बरोबर उत्तर नाही.

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