Error appears when I enter these config in, here are the diagram:

Router(config)#ip route 124.10.10.12 255.252.0.0 124.10.10.10
%Inconsistent address and mask
Router(config)#ip route 124.10.10.12 255.192.0.0 124.10.10.10
%Inconsistent address and mask
Router(config)#ip route 124.10.10.12 255.224.0.0 124.10.10.10
%Inconsistent address and mask
Router(config)#ip route 124.10.10.12 255.224.0.0 20.0.0.0
%Inconsistent address and mask
Router(config)#ip route 124.10.10.12 255.192.0.0 20.0.0.0
%Inconsistent address and mask
Router(config)#ip route 124.10.10.12 255.192.0.0 ser
Router(config)#ip route 124.10.10.12 255.192.0.0 serial 0/0/0
%Inconsistent address and mask