Advanced MathMediumTwo numbers, one four times the other, from a product
Advanced Math practice question
One positive number is four times another, and their product is 36. What is the difference between the two numbers?
Answer: 9
n · 4n = 36 gives n² = 9, n = 3. The numbers are 3 and 12; their difference is 9.
Common wrong answers
- If you answered 3
- 3 is the smaller number.
- If you answered 12
- 12 is the larger number.
- If you answered 15
- 15 is the sum.
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