Riddle

In olden days, the student of logic was given this problem: If half of 5 were 3, what would one-third of 10 be?

Choose an answer

A.It would be 3
B.It would be 3.33
C.It would be 5
D.It would be 4.
Hint: It's a 3-word phrase with 9 letters, starting with "I".

Answer

It would be 4.

Why this is the answer

If half of 5 is redefined as 3 (i.e. the usual value plus one), then applying the same adjusted proportion to one-third of 10 gives 4.

This riddle is filed under How, What, Why Riddles and rated Hard.