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In a book, the product of a page number and the number of the next page is 930. What is the smaller page number?

Answer and explanation

Correct answer: 30

Let the smaller page number be \(x\); then the next page number is \(x+1\). Thus, \(x(x+1)=930\), or \(x^2+x-930=0\). Factoring gives \((x-30)(x+31)=0\), so \(x=30\) or \(x=-31\). Since a page number must be positive, the smaller page number is 30. Exam tip: For consecutive positive integers, look for factor pairs of 930 that differ by 1—\(30\) and \(31\).

Related tags

Quadratic EquationsConsecutive IntegersWord ProblemsPage NumbersWord Problems And ApplicationsMathematicsClass 10 Mcq

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