AlgebraMediumLarger of two numbers from a sum and a multiple
Algebra practice question
The sum of two numbers is 20, and one number is three times the other. What is the larger number?
Answer: 15
Let the smaller be x; the larger is 3x. x + 3x = 20, so x = 5 and the larger is 15.
Common wrong answers
- If you answered 5
- 5 is the SMALLER number.
- If you answered 10
- 10 is half of 20, treating the numbers as equal.
- If you answered 6.67
- 6.67 is 20/3, dividing by the multiple instead of by 4 (the total number of parts).
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