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The sum of two consecutive natural numbers is 25. The smaller number is
A12
B13
C10
D11
Answer & Solution
Correct answer: A. 12
1. Let the smaller number be x; the next is x + 1.
2. Equation: x + (x + 1) = 25, so 2 x = 24.
3. x = 12, so smaller number = 12.
4. Larger number = 13.
_Source: Selina Concise Mathematics Class 8, Ch 18 Linear Equations in One Variable (Mistral OCR'd PDF), section on word problems_
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