Please help with Math question!!?

Question

Seven guests at a restaurant came,

The first every day,

The second every other day,

The third every third day,

and so on to

the seventh who came once a week.

When will they all come to dine at the restaurant on the same day?

(What is the smallest number of days?)

Answer 1

the first day.

Answer 2

it depends on what day of the week they came.

Answer 3

In 2520 days

Answer 4

420 days. This is the least common mutliple for 1 to 7. The smallest positive integer that is a multiple of 1 to 7.

Answer 5

find the LCM of 1,2,3,4,5,6,7

The guests will meet dine every 420 days

Answer 6

one day. seeing as the seventh can only come on one day. any more days would be impossible, seeing as the person would not be there....

the smallest number of days could be zero though, if the seventh person did not come on a certain day when the others were all there.