China Naming Network - Fortune telling knowledge - Using systematic sampling method, samples with a capacity of 20 were taken from 180 students, and 1: 180 students were randomly selected from 180, and divided into 20 samples on average according to the number order.

Using systematic sampling method, samples with a capacity of 20 were taken from 180 students, and 1: 180 students were randomly selected from 180, and divided into 20 samples on average according to the number order.

Let's set the randomly selected number in the 1 group as x,

Because 180 students are divided into 20 groups with 9 students in each group.

Then the number to be drawn for the 16 group is135+x.

That is 135+x= 140,

∴x=5.

So the answer is: 5.