Sal mon ▁and ▁C ay ley ) ▁ 2 8 7 5 ▁ ▁The ▁number ▁of ▁lines ▁on ▁a ▁general ▁qu int ic ▁three fold ▁ 3 2 6 4 ▁ ▁The ▁number ▁of ▁con ics ▁tang ent ▁to ▁ 5 ▁plane ▁con ics ▁in ▁general ▁position ▁( Ch as les ) ▁ 6 0 9 2 5 0 ▁▁ ▁The ▁number ▁of ▁con ics ▁on ▁a ▁general ▁qu int ic ▁three fold ▁ 4 4 0 7 2 9 6 ▁The ▁number ▁of ▁con ics ▁tang ent ▁to ▁ 8 ▁general ▁quad ric ▁surfaces ▁▁ 6 6 6 8 4 1 0 8 8 ▁ ▁The ▁number ▁of ▁quad ric ▁surfaces ▁tang ent ▁to ▁ 9 ▁given ▁quad ric ▁surfaces ▁in ▁general ▁position ▁in ▁ 3 - space ▁▁▁ 5 8 1 9 5 3 9 7 8 3 6 8 0 ▁The ▁number ▁of ▁tw isted ▁cub ic ▁curves ▁tang ent ▁to ▁ 1 2 ▁ ▁given ▁quad ric ▁surfaces ▁in ▁general ▁position ▁in ▁ 3 - space ▁ ▁References ▁ ▁External ▁links ▁ ▁Category : Inter section ▁theory ▁Category : Al gebra ic ▁geometry <0x0A> </s> ▁Car ▁games ▁are ▁games ▁played ▁to ▁pass ▁the ▁time ▁on ▁long ▁car ▁jour ne ys , ▁often ▁started ▁by ▁parents ▁to ▁am use ▁rest less ▁children . ▁They ▁generally ▁require ▁little ▁or ▁no ▁equipment ▁or ▁playing ▁space . ▁Some ▁such ▁games ▁are ▁designed ▁specifically ▁to ▁be ▁played ▁while ▁travel ing ▁( e . g . ▁the ▁license ▁plate ▁game , ▁the ▁Al phabet ▁Game