Generate a matrix containing all possible numbers

I am trying to achieve multiple matrices that will cover the full set of numbers. For example say I want to generate 5 matrices of length 10 that cover all the numbers from 1-20.

So matrix one will contain half the numbers say

m1 = [1 2 3 4 5 6 7 8 9 10];

while matrix two contains

m2 = [11 12 13 14 15 16 17 18 19 20];

Although this satisfies my condition with only two matrices not 5, I preferably need to generate all matrices randomly. Other than randomly generating the matrices and checking all values are generated is there a more efficient way to do this?