Question

perfect square....... 1. find the least square number which is exactly divisible by each of the number 8,12,15 and 20

Answer 1

You have to find the LCM of the four numbers.
For that you have to take the largest number and write down its multiples. Stop when the multiple is exactly divisible by all the numbers. Do this and you will find out the number to be 120.

Answer 2

Answer:

60

Step-by-step explanation:

2 8,12,15,20                2x2x2x3x5

2 4, 6, 15,10                 120x(2x3x5)

2 2, 3, 15,5                   120x30=3600

3 1,  3, 15,5                                =60x60

5 1,   1,  5 ,5                               =60

  1,  1,   1,  1