AlgebraEasyTwo numbers from their sum and difference
Algebra practice question
Two numbers have a sum of 7 and a difference of 1. What is the smaller number?
Answer: 3
a + b = 7 and a − b = 1 give a = 4 and b = 3.
Common wrong answers
- If you answered 4
- 4 is the larger number.
- If you answered 6
- 6 subtracts 1 from 7.
- If you answered 3.5
- 3.5 halves 7.
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