# 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

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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