Sandra didn't just say her age. She made you work for it.
80 minus 40 divided by 10 times 4. Most people read left to right, subtract first, and end up with completely wrong answers. Some get 16. Some get 80. A few get random numbers nobody can explain.
Solution:
The correct answer is 64.
Here's why. Math has a specific order of operations — PEMDAS. Division and multiplication always come before subtraction. So first, 40 divided by 10 equals 4. Then 4 times 4 equals 16. Finally, 80 minus 16 equals 64.
Sandra is 64 years old.
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