If 1+4 is 5 then what else is 1 + 4 ?

Question

If 1+4 is 5 then what else is 1 + 4 ?

Answer 1

"One trouser" is a humorous reference to the fact that trousers, like scissors, only come in pairs; Plus fours are trousers (coming to just below the knee, worn by golfers).  So 1 + 4 could be, humorously, "one plus four".  What is it?

Answer 2

??

Answer 3

5 because it is the same thing

Answer 4

Dealer and 4 punters at a poker table.

Answer 5

14

Answer 6

1 + 4 = ((cos(x)^2 + (sin(x)^2) +((4cos(x)^2 + (4sin(x)^2))

where " x " can be any number