Two consecutive even positive integers, sum of the squares of which is 1060, are · ABC26GN0410

Subject: General Aptitude · Chapter: Number System · Exam: CLAT 2016

Two consecutive even positive integers, sum of the squares of which is 1060, are
(a)12 and 14
(b)20 and 22
(c)22 and 24
(d)15 and 18
Answer
Answer (as printed): C
Explanation
Let, the two consecutive even numbers are $a$ and $(a+2)$, respectively According to question, $$\begin{aligned} & a^{2}+(a+2)^{2}=1060\left\{\because(a+b)^{2}=a^{2}+b^{2}+2 a b\right\} \\ & \Rightarrow a^{2}+a^{2}+4+4 a=1060 \\ & \Rightarrow 2 a^{2}+4 a-1056=0 \\ & \Rightarrow a^{2}+2 a-528=0 \\ & \Rightarrow a^{2}+24 a-22 a-528=0 \\ & \Rightarrow a(a+24)-22(a+24)=0 \\ & \Rightarrow(a-22)(a+24)=0 \\ & \Rightarrow a=-24,22 \end{aligned}$$

Explanation as extracted from the printed page; notation may be imperfect.

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