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identity choice MCQ Questions for Class 9

identity choice se related questions ko ek jagah revise karein. Har question me bilingual content, answer feedback aur explanation available hai.

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2 questions tagged with identity choice.

Question 1/2 Medium Mathematics Exploring Algebraic Identities Algebraic identities Class 9 Level 64

\( 203^2 \) निकालने के लिए सबसे उपयोगी रूप कौन सा है?

Which is the most useful form to find \( 203^2 \)?

Explanation opens after your attempt
Correct Answer

A. ( (200+3)2 )

Step 1

Concept

Writing (203) as (200+3) is easy. Exam tip: split a large number near a simple number.

Step 2

Why this answer is correct

The correct answer is A. ( (200+3)2 ). Writing (203) as (200+3) is easy. Exam tip: split a large number near a simple number.

Step 3

Exam Tip

(203) को (200+3) लिखना आसान है। परीक्षा में बड़ी संख्या को निकट सरल संख्या से तोड़ें।

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Question 2/2 Easy Mathematics Exploring Algebraic Identities Algebraic identities Class 9 Level 67

\( 45\times55 \) को किस पहचान से जल्दी निकाला जा सकता है?

Which identity can quickly find \( 45\times55 \)?

Explanation opens after your attempt
Correct Answer

C. ( (a+b)(a-b)=a-2-b-2 )

Step 1

Concept

(45\times55=(50-5)(50+5)). Exam tip: use difference of squares for numbers around the same centre.

Step 2

Why this answer is correct

The correct answer is C. ( (a+b)(a-b)=a-2-b-2 ). (45\times55=(50-5)(50+5)). Exam tip: use difference of squares for numbers around the same centre.

Step 3

Exam Tip

(45\times55=(50-5)(50+5)) है। परीक्षा में समान केंद्र वाली संख्याएँ अंतर वर्ग से करें।

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