Requiring some help with routed summarised (aggregated) address and subnet mask

Hi, so I am fairly new to networks and was wondering if someone could help me

I have the following networks

176.50.74.0/24 176.50.75.0/24 176.50.76.0/24 176.50.77.0/24 176.50.78.0/24

I understand that the subnet mask will start off as

255.255.x.x

And it will also be

176.50.x.x

Thanks in advance for any responses