# 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

Q96. **Simplify the following equation [(p - q)^2 - (p + q)^2] / 4p = b/a**

1.  a b = q
2.  q b = a
3.  a q = b
4.  a q = -b
5.  None of these

Solution : a q = -b
Q97. **Find the missing digit such that the number is a multiple of 11:** **945678_**

1.  3
2.  2
3.  8
4.  5
5.  None of these

Solution : 8
Q98. **Find the number of factors of 300 excluding 1 and itself.**

1.  18
2.  14
3.  16
4.  15
5.  None of these

Solution : 16
Q99. **Find the smallest number which should be multiplied with 520 to make it a perfect square.**

1.  30
2.  120
3.  55
4.  35
5.  none of these

Solution : none of these

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Q100. **Find the least number with which 16200 should be multiplied, to make it a perfect cube.**

1.  36
2.  48
3.  45
4.  360
5.  None of these

Solution : 45
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