Prediction: Your result will be 18
- Think of a number.
- Add 7 to it.
- Subtract 2.
- Subtract your original number.
- Multiply by 4.
- Subtract 2.
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Explanation:
This problem gives the illusion of guessing an unknown number, but the unknown has been cancelled
mathematically.
( X + 7 - 2 - X ) × 4 - 2 = 18
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