20 fl oz to the pint (it's on the measuring jug I use for cooking)
2 pints to the quart
4 quarts to the gallon (hence the name, I suspect) so 8 pints to the gallon
Won't be 70 for a while yet.
I'm in my mid 50s and know some of the imperial measures:
Ounces - Pints - Gallons
Ounces - Pounds - Stones - Hundredweight - (long) Tons
Inches - Feet - Yards - Chains - Furlongs - Miles
Dry volume measures like bushels and pecks or larger liquid measures like firkins and hogsheads I'm less sure about.
I'm not sure how many of my contemporaries would have learned and retained this information when it wasn't taught at school
.