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If \(x\) is a natural number and \(5x+1\leq 26\), how many possible values of \(x\) are there?

Answer and explanation

Correct answer: 5

Solving the inequality gives \(5x+1\leq 26\Rightarrow 5x\leq 25\Rightarrow x\leq 5\). Natural numbers begin with \(1\), so the possible values are \(1,2,3,4,5\), giving a total of 5 values. The answer 6 would result only if \(0\) were included as a natural number; here, the usual school convention takes natural numbers to begin with 1. Exam tip: After solving an inequality, list the allowed values and count them carefully.

Related tags

Natural NumbersCounting SolutionsLinear InequalitiesInequality In One VariableAlgebraic Solution Of Linear Inequalities In One VariableMathematicsClass 11 Mcq

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