ఇచ్చిన నమూనాను జాగ్రత్తగా అధ్యయనం చేసి, అందులోని ప్రశ్న గుర్తు (?)ని భర్తీ చేయగల ఎంపికల నుండి సంఖ్యను ఎంచుకోండి.

30 42 56
20 30 ?
12 14 16

This question was previously asked in
NTPC CBT-I (Held On: 5 Jan 2021 Shift 2)
View all RRB NTPC Papers >
  1. 50
  2. 42
  3. 40
  4. 54

Answer (Detailed Solution Below)

Option 2 : 42
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Detailed Solution

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తర్కం: వరుస వారీగా:

(1వ సంఖ్య - 3వ సంఖ్య) + 2 = 2వ సంఖ్య

వరుస 1: (30 - 12) + 2 = 18 + 2 = 20;

వరుస 2: (42 - 14) + 2 = 28 + 2 = 30;

అదేవిధంగా,

వరుస 3: (56 - 16) + 2 = 40 + 2 = 42.

కాబట్టి, 42 సరైన సమాధానం.

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