Question

find the Hcf of 4 and 5
find the Lcm of 4 and 5​

Answer 1

Answer:

1. The HCF of 4 and 5 is 1.

2. The LCM of 4 and 5 is 20.

Step-by-step explanation:

1. To calculate the HCF of 4 and 5, we need to factor each number (factors of 4 = 1, 2, 4; factors of 5 = 1, 5) and choose the highest factor that exactly divides both 4 and 5, i.e., 1.

2. To find the LCM of 4 and 5, we need to find the multiples of 4 and 5 (multiples of 4 = 4, 8, 12, 16 . . . . 20; multiples of 5 = 5, 10, 15, 20) and choose the smallest multiple that is exactly divisible by 4 and 5, i.e., 20.

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Answer 2

To find : HCF of $4$ and $5$

              LCM of $4$ and $5$  

Solution :

• HCF is the highest common factor also called as greatest common divisor ,( GCD ).

• Prime factors of $4 = 2\times 2$  
• Prime factors of $5 = 1\times 5$  
• HCF of $4$ and $5$   = $1$

• LCM is the least common multiple of numbers .

• To find the LCM of  $4$ and $5$  we find prime factors of $4$ and $5$  

• Prime factors of $4 = 2\times 2$  
• Prime factors of $5 = 1\times 5$  
• LCM = $2\times 2\times5$

                $= 20$

Hence , HCF of   $4$ and $5$ is $1$  and LCM of   $4$ and $5$ is $20$ .