SSAT Math Question 260: Answer and Explanation
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Question: 260
4. Which of the following gives the number of inches in x feet, y yards, and 5 inches?
- A. 12x + 36y + 5
- B. 12x + 36y + 60
- C. 12x + 3y + 5
- D.
+ 5
Correct Answer: A
Explanation:
The answer is A
There are 12 inches in 1 foot, so there are 12x inches in x feet. There are 36 inches in a yard (3 feet, 12 inches each), so there are 36y inches in y yards. Add these to 5 inches to obtain the answer.
Plug in numbers for x and y, such as x = 2 and y = 3. As there are 12 inches in a foot, x feet is 24 inches. As there are 36 inches in a yard (3 feet, 12 inches each), there are 108 inches in 3 yards. Add these to 5 inches for a total of 135 inches. Only choice (A) yields the correct answer when the chosen numbers are tested.