Question

5. Find the greatest number that will divide 90, 135 and 180, without leaving any remainder​

Answer 1

Answer:greatest be in lcm

90=5×3²×2

135=5*3³

180=5*3²*2²

=5*3³*2²

=5*27*4

=20*27

=540 is ur ans

Mark me brainlest

Step-by-step explanation:

Answer 2

Step-by-step explanation:

Suppose we have two numbers A and B and the greatest number which divides both A and B is the greatest common factor of A and B. 

Now we have to find g.c.d of 720 and 810. 

Since for any number we can factories in its prime factors then, 

720=2×2×2×2×3×3×5; 

810=2×3×3×3×3×5

 

Then greatest common factor is 2×3×3×5=90, then 90 is the greatest number that divides 720 and 810.

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