a building with 143 windows has more than two floors; each floor has the same number of windows as every other floor. If there are less than a dozen floors how many windows are on each floor.

i need help in this too

What number goes into 143 evenly? Note: it must be an odd number.

3 -- nope
5 -- nope
7 -- nope
9 -- nope
11 -- Yes!

There are 11 floors.

143 / 11 = _____ windows on each floor

To find the number of windows on each floor, we need to divide the total number of windows (143) by the number of floors. The problem tells us that there are less than a dozen floors, so let's consider the possible numbers of floors from 1 to 11 and calculate the number of windows on each floor.

For 1 floor: 143 windows / 1 floor = 143 windows on each floor
For 2 floors: 143 windows / 2 floors = 71.5 windows on each floor (Not possible since the number of windows must be a whole number)
For 3 floors: 143 windows / 3 floors = 47.67 windows on each floor (Not possible since the number of windows must be a whole number)
For 4 floors: 143 windows / 4 floors = 35.75 windows on each floor (Not possible since the number of windows must be a whole number)
For 5 floors: 143 windows / 5 floors = 28.6 windows on each floor (Not possible since the number of windows must be a whole number)
For 6 floors: 143 windows / 6 floors = 23.8 windows on each floor (Not possible since the number of windows must be a whole number)
For 7 floors: 143 windows / 7 floors = 20.43 windows on each floor (Not possible since the number of windows must be a whole number)
For 8 floors: 143 windows / 8 floors = 17.875 windows on each floor (Not possible since the number of windows must be a whole number)
For 9 floors: 143 windows / 9 floors = 15.89 windows on each floor (Not possible since the number of windows must be a whole number)
For 10 floors: 143 windows / 10 floors = 14.3 windows on each floor (Not possible since the number of windows must be a whole number)
For 11 floors: 143 windows / 11 floors = 13 windows on each floor

From the calculations above, we can see that there are 143 windows on each floor if there are precisely 11 floors in the building.