Question

Find attached least number which is exactly divisible by 15,18 and 20.​

Answer 1

Answer:

180

Step-by-step explanation:

To find exactly divisible by 15, 18 and 20 we have to find LCM

15 = 3 x 5 x 1

18 = 2 x 3 x 3 x 1

20 = 2 x 2 x 5 x 1

LCM(15, 18, 20) = 2 x 2 x 3 x 3 x 5 x 1

                        = 180

Answer 2

To Find the least number which is exactly divisible by 15,18 and 20. We have to find LCM of these numbers.

$\large\tt\implies15 = 3 \times5 \times 1 \\ \\\large \tt\implies 18 = 2 \times 3 \times 3 \times 1 \\ \\\large\tt\implies 20 = 2 \times 2 \times 5 \\ \\\large\tt\implies \large LCM =3 \times 3 \times 2 \times 2 \times 5 \\ \\\tt\implies\large LCM = 180$

180 is the least number which is exactly divisible by 15,18 and 20