Question

find the LCM and HCF of the following pairs of number using prime factorisation method,321,396​

Answer 1

Answer:

Step-by-step explanation:

The LCM and HCF of the following pairs of numbers using prime factorisation method is :

1) 321 and 396. 321 = 3 × 107. 396 = 2 × 2 × 3 × 3 × 11. LCM = 2 × 2 × 3 × 3 × 11 × 107 = 42372. HCF = 3.

2) 455 and 42. 455 = 5 × 7 × 13. 42 = 2 × 3 × 7. LCM = 2 × 3 × 5 × 7 × 13 = 2730. HCF = 7.

3)  408 and 170.

Answer 2

The LCM and HCF of the following pairs of numbers using prime factorisation method is :

321 and 396. 321 = 3 × 107. 396 = 2 × 2 × 3 × 3 × 11. LCM = 2 × 2 × 3 × 3 × 11 × 107 = 42372. HCF = 3.

455 and 42. 455 = 5 × 7 × 13. 42 = 2 × 3 × 7. LCM = 2 × 3 × 5 × 7 × 13 = 2730. HCF = 7.

408 and 170.