Question

Find the least square number which is exactly divisible by each of the numbers 8,12,15 and 20

Answer 1

First find LCM of 8 , 12 , 15 , 20 which 120
120 = 2 × 2 ×2 × 3 × 5
Pairs of 2 , 3 and 5 are not complete , so multiply 120 by 2 , 3 and 5 to make it a perfect square 120 × 2 × 3 × 5 = 3600
3600 is the required answer

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