రెండు సంఖ్యల మధ్య భేదం 5. చిన్న సంఖ్య నుండి 25 తీసివేసి, పెద్ద సంఖ్యకు 20 కలిపితే నిష్పత్తి 1:2 అవుతుంది. పెద్ద సంఖ్య ఏది?

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NTPC CBT-I (Held On: 8 Jan 2021 Shift 1)
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  1. 80
  2. 90
  3. 85
  4. 75

Answer (Detailed Solution Below)

Option 1 : 80
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RRB NTPC CBT-I Official Paper (Held On: 4 Jan 2021 Shift 1)
100 Qs. 100 Marks 90 Mins

Detailed Solution

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ఇవ్వబడినది:

రెండు సంఖ్యల మధ్య భేదం = 5

చిన్న సంఖ్య నుండి 25 తీసివేసి, పెద్ద సంఖ్యకు 20 కలిపితే నిష్పత్తి = 1 : 2

గణన (లెక్కింపు):

పెద్ద సంఖ్య x మరియు చిన్న సంఖ్య (x - 5) అనుకొనుము. 

ఇప్పుడు, ప్రశ్న ప్రకారం,

(x – – 25) : (x + 20) = 1 : 2

⇒ (x –  30)/(x + 20) = 1/2

⇒ 2x – 60= x + 20

⇒ x = 80

∴ పెద్ద సంఖ్య 80

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