Problem
A group of 9 friends invest equally in a business opportunity that costs $20,000. If n more friends were to take part evenly in the investment...
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So What?
Math questions involving two equations and two unknowns can usually be combined into one equation with one unknown.
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Math Multiple-Choice
- Keep in mind that on a multiple-choice question, the correct answer will always be there (even if it is "none of these"). You just have to eliminate the wrong answers to find it.
- Estimate answers. For example, you might round off all numbers, say to the closest power of 10, and estimate the answer. Estimation, when appropriate, can help you save time on computations.
- Use the process of elimination. Wrong answers are often easier to find than the right answer.
- Write down formulas on your test booklet so you use them correctly.
- When plugging in numbers to expressions with variables or unknowns in them (x), substitute both positive and negative values, zero, and fractions as values, unless the directions define the term otherwise (for example, x > 0).
- Don't worry if you can't answer every question. Very few people can. Work carefully on those you can answer, and, if you skip a problem, be sure to skip the corresponding row on the answer sheet.
- Keep practicing! The more you practice, the more comfortable you will be with the PSAT format and the skills it tests.
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