यदि (u=10q+7), तो \(u^2-u\) को 10 से भाग देने पर शेषफल क्या होगा?

If (u=10q+7), what is the remainder when \(u^2-u\) is divided by 10?

Explanation opens after your attempt
Correct Answer

B. 2

Step 1

Concept

The remainder of (u) is 7.

Step 2

Why this answer is correct

The remainder of \(u^2-u\) comes from \(7^2-7=42\), and \(42=10\times4+2\).

Step 3

Exam Tip

Substitute the remainder first, then find the final remainder. चरण 1: (u) का शेषफल 7 है। चरण 2: \(u^2-u\) का शेषफल \(7^2-7=42\) से मिलेगा, और \(42=10\times4+2\)। चरण 3: व्यंजक में पहले शेषफल रखें, फिर अंतिम शेषफल निकालें।

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Mathematics Answer, Explanation and Revision Hints

यदि (u=10q+7), तो \(u^2-u\) को 10 से भाग देने पर शेषफल क्या होगा? / If (u=10q+7), what is the remainder when \(u^2-u\) is divided by 10?

Correct Answer: B. 2. Explanation: चरण 1: (u) का शेषफल 7 है। चरण 2: \(u^2-u\) का शेषफल \(7^2-7=42\) से मिलेगा, और \(42=10\times4+2\)। चरण 3: व्यंजक में पहले शेषफल रखें, फिर अंतिम शेषफल निकालें। / Step 1: The remainder of (u) is 7. Step 2: The remainder of \(u^2-u\) comes from \(7^2-7=42\), and \(42=10\times4+2\). Step 3: Substitute the remainder first, then find the final remainder.

Which concept should I revise for this Mathematics MCQ?

The remainder of (u) is 7.

What exam hint can help solve this Mathematics question?

Substitute the remainder first, then find the final remainder. चरण 1: (u) का शेषफल 7 है। चरण 2: \(u^2-u\) का शेषफल \(7^2-7=42\) से मिलेगा, और \(42=10\times4+2\)। चरण 3: व्यंजक में पहले शेषफल रखें, फिर अंतिम शेषफल निकालें।