ABC26GN0252 · Number System

Subject: General Aptitude · Chapter: Number System · Exam: 2008 · Marks: · Difficulty:

Let a number of three digits have for its middle digit the sum of the other two digits. Then it is a multiple of
(a)10
(b)11
(c)18
(d)50
Answer
Answer (as printed): B
Explanation
We know that a number having $x, y, z$ as its digits, is a multiple of 11 , if $z+x-y=0$ Hence, $y=z+x$.

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

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