Question

Find least number of stones so that heaps of 15,20 or 30 stones can be made

Answer 1

Finding the LCM of 15,20 and 30

15=3×5
20=2×2×5
30=2×3×5

LCM=3×5×2×2
LCM=60

Therefore, minimum 60 stones are required.

Answer 2

Answer:

The required Least number of stones is 60.

Step-by-step explanation:

The Required Least number of stones is the LCM ( Lowest common Multiple ) of 15 , 20 and 30

We find LCM by prime factorization method,

15 = 3 × 5

20 = 2 × 2 × 5

30 = 2 × 3 × 5

So, LCM = 5 × 2 × 3 × 2 = 60

Therefore, The required Least number of stones is 60.