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
Correct Answer

A. 16

Step 1

Concept

The remainder of (u) is 13.

Step 2

Why this answer is correct

The remainder of \(u^2-u\) comes from \(13^2-13=156\).

Step 3

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।

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Mathematics Answer, Explanation and Revision Hints

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?

Correct Answer: A. 16. Explanation: 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। / Step 1: The remainder of (u) is 13. Step 2: The remainder of \(u^2-u\) comes from \(13^2-13=156\). Step 3: \(156=20\times7+16\), so the remainder is 16.

Which concept should I revise for this Mathematics MCQ?

The remainder of (u) is 13.

What exam hint can help solve this Mathematics question?

\(156=20\times7+16\), 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।