IP Subnetting /16 into 5 equal parts

I having a hard time understanding IP subnetting for /16 mask. I went through some tutorials and understood the host part and non-vlsm but with vlsm and dividing into equal parts, is something I am not sure yet. Especially for the below sample, if someone can help me with the output, I will be able to deduce the explanation. **For this: 10.0.0.0/16, I have been asked to divide into 5 equal parts**. Based on the tutorials I followed, one of them is this : [IP Subnetting](https://www.cisco.com/c/en/us/support/docs/ip/routing-information-protocol-rip/13788-3.html) , I came up with these but my mentor says its wrong and I am not sure why.

10.0.0.0/18 --- IP Range: 10.0.0.1 ==> 10.0.63.254 (16384 IP addresses)
10.0.64.0/18 --- IP Range: 10.0.64.1 ==> 10.0.127.254 (16384 IP addresses)
10.0.128.0/18 --- IP Range: 10.0.128.1 ==> 10.0.191.254 (16384 IP addresses)
10.0.192.0/19 --- IP Range: 10.0.192.1 ==> 10.0.223.254 (8192 IP addresses)
10.0.224.0/19 --- IP Range: 10.0.224.1 ==> 10.0.255.254 (8192 IP addresses)

I am assuming it's incorrect because it's not in equal parts. I hope someone guides and can provide the correct answer to it. Thanks in advance!