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Q.

Find the HCF of the numbers given. k, 2k, 3k, 4k and 5k, where k is any positive integer.


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a

k

b

2k

c

3k

d

4k 

answer is A.

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Detailed Solution

Concept- Highest Common Factor (HCF) of two or more numbers is the greatest factor that divides the numbers
Given numbers are,
K , 2k, 3k, 4k , 5k
Where k is any positive integer
Now, k = k
2k  = 2 × k
3k  = 3 × k
4k  = 4 × k
5k  = 5 × k
In all these numbers HCF is k.
Hence, of all given number is k
Hence, the correct option is 1.
 
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