You can buy maximum of 5 pens with it and be left with $1.25
Frequently asked questions (FAQs)
What is the product of (4+3i) and (-2-5i)?
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What is the maximum value of the function f(x) = 2x^3 - 6x^2 + 4x - 7 over the interval [0, 5]?
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What is the maximum number of books that can be stacked on top of each other without falling, if each book is 1 inch thick and the height of the stack cannot exceed 15 feet?