IP addressing problem help

Hi
Please see the attachment.
Can you explain how to get the router IP address?
How do you get the start IP address value 160?
and work out the valid host range from 161 to 190?

How did you work out the IP address is in the 160 subnet?
192.168.5.180/27 /27 is 255.255.255.224  so 256-224=32 which is magic number which gives the subnet increment
---> the multiples of 32 are 0,32,64,96,128,160,192,... and so 180 is less than 192 but greater than 160 so it is in this subnet
Now that we have the subnet we can calculate addresses this way:
-1st usable address is subnet+1 ----> 192.168.5.161
-broadcast address is last address in the subnet ---->192.168.5.191
-last usable address is broadcast -1 ----> 192.168.5.190
Regards.

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