2 अंकों की संख्या का इकाई अंक, उसके दहाई अंक का तीन गुना है। यदि इकाई अंक 6 है, तो संख्या के दोगुने का मान कितना है?

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RRB Group D 27 Sept 2022 Shift 3 Official Paper
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  1. 52
  2. 26
  3. 48
  4. 24

Answer (Detailed Solution Below)

Option 1 : 52
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दिया गया है:

2 अंकों की संख्या का इकाई अंक, उसके दहाई अंक का तीन गुना है।

इकाई अंक 6 है

प्रयुक्त अवधारणा:

किसी संख्या के स्थानीय मान (इकाई अंक और दहाई अंक) का सिद्धांत।

गणना:

माना, 2 अंकों की संख्या (10x + y) है।

संख्या का दहाई अंक होगा = \(\large{unit\:digit \over 3} ={6\over 3}= 2\),

इस प्रकार, 2 अंकों की संख्या = (10 x 2 + 6) = 26

अब संख्या का दोगुना मान = 26 x 2 = 52

अतः, सही उत्तर '52' है।

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