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Spin to win
Before we reveal the answer…
Take one more look at the puzzle.
Ready to reveal the answer and logic?
Answer:
Spin A once
But why?
It feels like having two goes with spinner B might give you a better chance of winning, but actually it’s worse.
Spinning A once gives you a 50% chance of winning. Spinning B once gives you a 25% chance of winning, so a 75% (or 3/4) chance of losing. So spinning B twice gives you a 3/4 x 3/4 = 9/16 = 56.25% chance of losing, or a 43.75% chance of winning