00:01
He is clear so an numerate here.
00:02
So for part a, we have 1, 4, 3, 2.
00:07
We're going to determine the last pair of digits that is an increasing order.
00:12
So we have 3 is bigger than 2, 4 is bigger than 2, 4 is bigger than 3, and 1 is smaller than 2.
00:21
So we select the digits 1 and 2.
00:25
Then we're going to determine the next larger permutation, and we get 2, 1, 3, 4.
00:32
For part b, we have 5, 4, 1, 2, 3.
00:45
We're going to compare the last two digits, which is 2 is smaller than 3.
00:50
So we select these 2, and so we get 5, 4, 1, 3.
01:00
Part c, we're given 1, 2, 4, 5, 3.
01:08
5 is bigger than 3, 4 is bigger than 3, and 4 is smaller than 5.
01:14
So we select four and five.
01:17
We get one, two, five, three, four...