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1. Two numbers when divided by a certain divisor give remainder 35 and 30 respectively and when their sum is divided by the same divisor, the remainder is 20, then the divisor is:

  • A. 40
  • B. 40
  • C. 40
  • D. 40

Answer: Option B

Explanation:

 ধরি, সংখ্যা দুইটি যথাক্রমে x ও y এবং ভাজক a প্রশ্নমতে,xa=35...................iya=30..........................ii এবংx+ya=20.......................... সেট তত্বের সূত্র অনুযায়ী,a=xa+ya-x+ya=35+30-20=45

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