Question

Find the least number of 5-digits which is exactly divisible by 9, 12, 45,54 and 72.​

Answer 1

Answer:

Answer:

9,12,45,54

9,6,45,27

3,2,15, 9

1 ,2, 5 3

Hence the LCM of 9,12,45 and 54 is 2×3×3×3 ×2×5×3

=> 1620 Total answer is

=> 10800

Answer 2

explanation

9,12,45,54,72 by 2

9,6,45,27,36 by 2

9,3,45,27,18 by 2

9,3,45,27,9 by 3 2*2*2*3*3*3*5=1,080

3,1,15,9,3 by 3

1,1,5,3,1 by 3

1,1,5,1,1 by 5

1,1,1,1,1

Let's cheak

9/1,080 = 120

12/1,080= 90

45/1,080 = 24

54/1,080=20

72/1,080= 15

answer 1,080 is the least number of 5-digit which is exactly divisible by 9,12,45,54 and 72