यदि (u=20q+13), तो \(u^2-u\) को 20 से भाग देने पर शेषफल क्या होगा?
If (u=20q+13), what is the remainder when \(u^2-u\) is divided by 20?
Explanation opens after your attempt
A. 16
Concept
The remainder of (u) is 13.
Why this answer is correct
The remainder of \(u^2-u\) comes from \(13^2-13=156\).
Exam Tip
\(156=20\times7+16\), so the remainder is 16. चरण 1: (u) का शेषफल 13 है। चरण 2: \(u^2-u\) का शेषफल \(13^2-13=156\) से मिलेगा। चरण 3: \(156=20\times7+16\), इसलिए शेषफल 16 है।
Login to save your score, XP, coins and progress.
