I love and hate these questions... The answer is 15, but depending on the solving process it could also be 60.
(Bonus: If you missed up in the third step, you could get 25 or 70 at the end.)
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I love and hate these questions... The answer is 15, but depending on the solving process it could also be 60.
(Bonus: If you missed up in the third step, you could get 25 or 70 at the end.)