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Doctors Medicines MCQs Q&A

  1. Only A
  2. Only B
  3. Both A and B
  4. Neither A nor B
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1 Answers

Option 1 : Only A

⇒ 12345× 54456 + 78698

⇒ 31 × 44 + 62

⇒ 3 × 6 + 6 = 14

∴ unit digit is 4

As we know,

⇒ 125! = 125 × 124 × 123 × ……. × 1

⇒ ∴ unit digit is 0 
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