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Q.

Find the HCF of  36 and 144.


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a

36

b

144

c

4

d

2  

answer is A.

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Detailed Solution

Given numbers are 36, 144, 4 and 2.
To find out - HCF of the given numbers.
First factorise them,
2 36 2 18 3 9 3 3 1  
36=2×2×3×3.
2 144 2 72 2 36 2 18 3 9 3 3 1  
144=2×2×2×3×3.
Taking common factor, we get,
HCF =2×2×3×3 ⇒ HCF =36
Hence, the correct option is 1.
 
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Find the HCF of  36 and 144.