Question

2)which is the least number divisible by 10, 18 and 25?

Answer 1

Answer:

least number divisible=

lcm of 10;18;25

for 10=2*5

18=3*3*2

25=5*5

in both the cases; least number divisible =2

Answer 2

The least number divisible by 10, 18 and 25 is 450.

Given:

The numbers are 10,18 and 25.

To Find:

We have to find the least number divisible by 10, 18 and 25

Solution:

We know that the least number divisible by 3 numbers a,b and c is the least common multiple of a,b and c.

Therefore, the least number divisible by 10,18 and 25 is LCM(10,18,25).

Now,

10= 2×5

18=2×3×3

25=5×5

Therefore, LCM(10,18,25) = 2×3×3×5×5=450

Hence, the least number divisible by 10, 18 and 25 is 450.

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