Q:
90% of people fail to solve this math puzzle?

Answer & Explanation
Answer: D) -60
Explanation: A - A - A = 20
B - B - B = 15
C - C - C = 25
A = -20
B = -15
C = -25
=> A + B + C = (-20)+(-15)+(-25) = -20 - 15 - 25 = -60.
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