[CV125] Rolling the Die

Puzzle

A young boy sits quietly on a stoop rolling a single die over and over. Each time the die stops rolling, he picks it up, examines it, and whispers something to himself.

Each time he rolls a one, he whispers, "15."
Each time he gets a six, he whispers, "20."

The boy has just rolled a three. What number will he whisper this time?

Hints

Solution

Incorrect

Nope.

There must be some reason why this boy is whispering those numbers. It's up to you to find it.

Correct

The answer is 17.

The boy is counting the number of dots currently visible on the die. The only face of the die not included in this count is the one that faces down.

The top and bottom sides of a die always add up to seven, so it's easy to calcuate the total for the five faces exposed on any given roll.

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