00:01
The missing numbers, we're simply going to add the two numbers in the squares above it.
00:04
So for example, if we look at the fifth row, we're missing a number, and the two numbers above that are three and three, which means that number would be six.
00:13
If we look at the seventh row, we have the square, and we have the numbers five and one above it, which means that number would also be six.
00:24
Let's go ahead and look at the next row where we have a square, and they have the numbers 20 and 25 above it, so this would be a 45.
00:33
And you can do that, continue that process quite easily.
00:36
Now we want to know the sum of each row in the triangle.
00:39
So let's start.
00:40
We have the first row has a sum of one, the second row is sum of two.
00:44
The third row has a row a sum of four.
00:48
The next row has a sum of 36, 7, 8.
00:54
And now that we know that that's a six, we know the next row is going to have a sum of 5 and 11 and 5 to be 16.
01:05
So notice that we are doubling each one to get to the next sum...