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The product of two numbers that are respectively 4 and 10 greater than a positive number is 952. What is the original number?

Answer and explanation

Correct answer: 24

Let the original number be \(x\). The required equation is \((x+4)(x+10)=952\). On expanding, \(x^2+14x-912=0\), which factors as \((x-24)(x+38)=0\). Thus, \(x=24\) or \(x=-38\); since the number is specified as positive, the correct answer is 24. Verification: \((24+4)(24+10)=28\times34=952\). In an exam, substitute the chosen value back into the original product to verify it.

Related tags

Quadratic EquationsWord ProblemsForming EquationsVerificationWord Problems And ApplicationsMathematicsClass 10 Mcq

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