Sally is a patient in a hospital.
she has to take a red pill every four hours, a blue pill every six hours and a white pill every 8 hours.
she takes a pill of each color at midday.
when will she next take a pill of each color at the same time ?

The answer for this question would be MIDDAY THE NEXT DAY. Sally will take a pill of each color at the same time midday, the next day. Here is how to find the answer. We need to find the lowest common multiple or LCM of the numbers 4, 6 and 8. 
The LCM of 4 and 8 only would be 8, but 8 is not a multiple of 6 
The LCM of 4 and 6 only would be 12, but 12 is not a multiple of 8 
The LCM of 6 and 8 only would be 24, and 24 is a multiple of 4, then 24 works. 
Therefore, it will be after 24 hours, which gives us the answer of next day, midday. Hope this answer helps.

Atissue is a group of connected cells that have a similar function within an organism.

It depends on the surface of the levels. the rougher the surface, the greater is the frictional force. for rougher surfaces, you would need to exert greater force to move the object. the concept is that, you must overcome the frictional force in order to bring the object into motion. this is the reason why we add lubricants to the joints so they could easily move. this answer was on