Question

2.Find the L.C.M of the following by prime factorization method:

(i) 42, 63, 162

(ii) 42, 78, 104, 112

(iii) 16, 28, 40, 77

(iv) 112, 168, 22824.​

Answer 1

Answer:

2 | 16 , 28 , 40 , 77 .

= 2 | 8 , 14 , 20 , 77 .

= 2 | 4 , 7 , 10 , 77.

=2 | 2 , 7 , 5 , 77.

= 7 | 2 , 1 , 5 , 11.

Therefore LCM of the given nos.

= 2 × 2 × 2 × 2 × 2 × 7 × 5 × 11 × 1

= 12320.

Answer 2

42,63,162=1134
42,78,104,112=82992
16,28,40,77=6160