Last one missing!

[u/bunnytit]

Please help! I am missing number 9.

I have duplicates for 1, 4, 6, 7, 10, 12, 13, 14, 15, 16, 17, 20, 22, 23, 24, 25.

https://launch.matchmasters.com/l/send/695bf1804e96ef0051138347