00:01
So we are given a rectangular floor 5 .1 meters by 5 .25 meters.
00:07
And we are asked to find what the minimum number of square tiles we would need to fill this floor.
00:17
So what we need to do is we need to find the greatest common factor between 5 .1 meters and 5 .25 meters.
00:29
What i'm going to do is i'm going to change the units on these events.
00:33
So i'm going to convert meters into centimeters so that we can get both of these numbers to be whole numbers.
00:41
So 5 .1 meters becomes 510 centimeters as we are multiplying by 100, and 5 .25 meters will become 525 centimeters.
00:56
The first thing that jumps out at me when i see 525 and 510 is the number 5 .5 as a number 5.
01:06
Greatest common factor.
01:10
Because 525 ends with the number 5, and 510 ends with 10, so we can probably get an even number here.
01:22
When we divide 525 by 5, we end up with 105, and when we get 510, divided by 5, that is 102.
01:36
Now from here we can also divide this by three...