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Q.

What is the reciprocal of 2 5 × −4 9  ?


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a

−8 45  

b

−45 8  

c

45 8  

d

8 45   

answer is B.

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Detailed Solution

We need to find the reciprocal of 2 5 × −4 9  .
2 5 × −4 9 = 2×−4 5×9  
= −8 45   Reciprocal of −8 45   is 45 −8  . It can be simplified as:
45 −8 × −1 −1 = −45 8  .
Therefore, the reciprocal of 2 5 × −4 9   is −45 8  .
Hence, 2 is the correct option.
 
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