A Little Late… Friday’s Quiz

Okay, after finishing at Corporate for the day, the boss finally sent the
Friday Quiz…

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I was talking with my wife last night and telling her that I had planted
five rows of four trees each, for a total of ten trees.

My darling little daughter, having just learned her multiplication
tables, said, ?No, daddy, five times four is twenty. You mean twenty
trees.?

?No, you little twerp,? I said. ?I planted five rows each of four trees for
a total of ten trees.?

How did I do it.