366 × 641 × 753 এ এককের সংখ্যা কত?

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RRB ALP Fitter 23 Jan 2019 Official Paper (Shift 3)
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  1. 8
  2. 3
  3. 6
  4. 7

Answer (Detailed Solution Below)

Option 1 : 8
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প্রদত্ত: 7

366 × 641 × 753  

ধারণা:

একটি সংখ্যার শক্তির একক সংখ্যা প্রতি চতুর্থবার পুনরাবৃত্তি করে

গণনা:

366 এর একক সংখ্যা

⇒ 66/4

⇒ 2 (যেহেতু 3 এর চক্রাকার 4 হয়)

সুতরাং, শেষ সংখ্যা = 32

⇒ 9

এছাড়াও, 641 এর একক সংখ্যা = 6 

এছাড়াও, একক সংখ্যা 753

⇒ 53/4

⇒ 1 (যেহেতু 7 এর চক্রাকার 4 হয়)

সুতরাং, শেষ সংখ্যা  = 71

⇒ 7

এখন, উভয়কে গুণ করুন

⇒ 9 × 6 × 7 = 378

∴ একক সংখ্যা 8 

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