number-system

Number System

Number System Questions: What is Number System in Maths? Divisibility Rules for 7, Divisibility Rules for 11, Binomial Theorem Questions, Factorize Expressions

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Online Aptitude Questions with Answers on Number System

Q206. On dividing 2272 as well as 875 by 3-digit number N, we get the same remainder. The sum of the digits of N is:

  1.  10
  2.  11
  3.  12
  4.  13

Solution : 10
Q207. **A boy multiplied 987 by a certain number and obtained 559981 as his answer. If in the answer both 9 are wrong and the other digits are correct, then the correct answer would be:**

  1.  553681
  2.  555181
  3.  555681
  4.  556581

Solution : 555681
Q208. **How many prime numbers are less than 50 ?**

  1.  16
  2.  15
  3.  14
  4.  18

Solution : 15
Q209. **When a number is divided by 13, the remainder is 11. When the same number is divided by 17, then remainder is 9. What is the number ?**

  1.  339
  2.  349
  3.  369
  4.  Data inadequate

Solution : 349

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Q210. (51 + 52 + 53 + ... + 100) = ?

  1.  2525
  2.  2975
  3.  3225
  4.  3775

Solution : 3775
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