Question

Find LCM and HCF of 2 5 × 5 4 × 7 2 × 136 2 3 × 5 6 × 7 × 173??​

Answer 1

Prime factorisation of the given numbers are : 54 = 2 × 3 × 3 × 3 72 = 2 × 2 × 2 × 3 × 3 90 = 2 × 3 × 3 × 5 Notice that 2 occurs as a common .

Answer 2

Answer:

LCM = 25,77,36,06,43,200

HCF = 8

Step-by-step explanation:

25 = 5 x 5

54 = 2 x 3 x 3 x 3

72 = 2 x 2 x 2 x 3 x 3

136 = 2 x 2 x 2 x 17

25 x 54 x 72 x 136 = 2 x 2 x 2 x 2 x 2 x 2 x 2 x 3 x 3 x 3 x 3 x 3 x 5 x 5 x 17

23 = 1 x 23

56 = 2 x 2 x 2 x 7

7 = 1 x 7

173 = 1 x 173

23 x 56 x 7 x 173 = 2 x 2 x 2 x 7 x 7 x 23 x 173

TO FIND HCF = 25 x 54 x 72 x 136

                          23 x 56 x 7 x 173

= 2 x 2 x 2 x 2 x 2 x 2 x 2 x 3 x 3 x 3 x 3 x 3 x 5 x 5 x 17

= 2 x 2 x 2 x 7 x 7 x 23 x 173

HCF is = 2 x 2 x 2 = 8

LCM is = 2 x 2 x 2 x 2 x 3 x 3 x 3 x 3 x 3 x 5 x 5 x 17 x 7 x 7 x 23 x 173 x 8

          ( underline numbers i make their product after multiply)

LCM = 16 x 27 x 9 x 25 x 17 x 49 x 23 x 173 x 8

LCM = 25,77,36,06,43,200