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Q.

If the LCM of two numbers is 1024 and one of them is a prime number, then what’s their HCF?


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a

0

b

1

c

4

d

2 

answer is D.

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Detailed Solution

Given data,
LCM = 1024
The first number is a prime number.
Calculating the LCM of 1024.
⇒1024=210
Thus, the only prime factor of 1024 is 2.
Therefore, HCF is 2.
Hence, option 4 is correct.
 
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