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Q.


Express 140 as a product of its prime factors.

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a

2 2 ×5×7  

b

2 3 ×5×7  

c

2 4 ×5×7  

d

2 5 ×5×7   

answer is A.

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Detailed Solution

Given a number 140.
The prime factors are,
=140 =2×2×5×7 = 2 2 ×5×7   The product of prime factors of 140 are 2 2 ×5×7  .
Hence, option 1 is correct.

 
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