Brain Teasers
Mad Ade's Riddle
It's always 1 to 6,
it's always 15 to 20,
it's always 5,
but it's never 21,
unless it's flying.
What is this?
it's always 15 to 20,
it's always 5,
but it's never 21,
unless it's flying.
What is this?
Answer
It's a die."It's always 1 to 6": the numbers on the faces of the die,
"it's always 15 to 20": the sum of the exposed faces when the die comes to rest after being thrown,
"it's always 5": the number of exposed faces when the die is at rest,
"but it's never 21": the sum of the exposed faces is never 21 when the die is at rest,
"unless it's flying": the sum of all exposed faces when the die is flying is 21 (1 + 2 + 3 + 4 + 5 + 6).
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