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Q.

Rational number x= a b ,b0,  a and b are integers as well as a and b are co-prime) 23 2 3 5 2  ? Find for how many decimal places do a given rational number terminates?


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a

4   

b

3   

c

5  

d

6 

answer is B.

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Detailed Solution

Given a rational number 23 2 3 5 2  .
Let us find at what values it terminates.
Check if denominator can be converted to powers of 10
According to the question we have 23 2 3 5 2   It can be written as
  23 2 3 5 2 = 23×5 2 3 5 3 = 115 10 3   Hence, it will terminate after three decimal places
Hence, the correct answer is option 2.
 
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Rational number x= a b ,b≠0,  a and b are integers as well as a and b are co-prime) 23 2 3 5 2  ? Find for how many decimal places do a given rational number terminates?