यदि N = 795 - 358 है, तो N के इकाई स्थान पर अंक है-

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CGPSC Civil Service 2019 Official Paper 2 (CSAT)
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  1. 3
  2. 4
  3. 6
  4. 7

Answer (Detailed Solution Below)

Option 2 : 4
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गणना:

71 का इकाई स्थान = 7, 72 = 9, 73 = 3, 74 = 1

795 का इकाई स्थान = 723 × 4 × 73 = 3

31 का इकाई स्थान = 3, 32 = 9, 33 = 7, 34 = 1

358 का इकाई स्थान = 314 × 4 × 32 = 9

795 का इकाई 3 है, जो 9 से कम है

फिर 3 को 13 लीजिए (कैरी नियम से)

N का इकाई स्थान = 795 - 358 = 13 - 9 = 4

∴ N का इकाई अंक 4 है।

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