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Chapter 6 of 14
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Proportional Reasoning-2

CBSE · Class 8 · Mathematics

Flashcards for Proportional Reasoning-2 — CBSE Class 8 Mathematics. Quick Q&A cards covering key concepts, definitions, and formulas.

55 questions76 flashcards5 concepts

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76 Flashcards
Card 1आनुपातिकता

आनुपातिक संबंध क्या है?

Answer

आनुपातिक सम्बन्ध वह सम्बन्ध है जिसमें दो या दो से अधिक सम्बन्धित राशियाँ एक ही गुणक से बदलती हैं। यदि एक राशि को गुणा या भाग किया जाय तो सम्बन्ध को संतुलित रखने के लिए दूसरी राशि भी उसी गुणक से बदलती

Card 2Proportionality

What is a proportional relationship?

Answer

A proportional relationship is one in which two or more related quantities change by the same factor. If one quantity is multiplied or divided, the other changes by the same factor to keep the relatio

Card 3Cross-multiplication

How can two ratios a:b and c:d be checked for proportionality?

Answer

Two ratios a:b and c:d are proportional if a × d = b × c, or if a/c = b/d. This is called cross-multiplication. It helps check whether two ratios are equal in proportion.

Card 4क्रॉस-मल्टीप्लीकेशन

दो अनुपातों a:b और c:d को आनुपातिकता के लिए कैसे जाँचा जा सकता है?

Answer

दो अनुपात a:b और c:d आनुपातिक होते हैं यदि a × d = b × c, या यदि a/c = b/d. This is called cross-multiplication. It helps check whe, या यदि दो अनुपात समान अनुपात में हैं।

Card 5आनुपातिक अनुपात

6:3 और 4:2 के अनुपात क्यों आनुपातिक हैं?

Answer

क्रॉस-गुणा का प्रयोग करें: 6 × 2 = 12 3 × 4 = 12 चूंकि क्रॉस गुणनफल बराबर हैं, इसलिए अनुपात समानुपाती हैं। यही कारण है कि दो इडली मिश्रणों को समतुल्य अनुपात के रूप में माना जा सकता है।

Card 6Proportional Ratios

Why are the ratios 6:3 and 4:2 proportional?

Answer

Use cross-multiplication: 6 × 2 = 12 3 × 4 = 12 Since the cross products are equal, the ratios are proportional. This is why the two idli mixtures can be treated as equivalent proportions.

Card 7Ratio Meaning

What does 2:1 mean in the idli batter example?

Answer

The ratio 2:1 means 2 cups of rice for 1 cup of urad dal. A ratio tells how much of one quantity is used compared with another quantity.

Card 8अनुपात का अर्थ

इडली के घोल के उदाहरण में 2:1 का क्या मतलब है?

Answer

2:1 का अनुपात का मतलब है 1 कप उड़द दाल के लिए 2 कप चावल। अनुपात बताता है कि एक मात्रा की तुलना में दूसरी मात्रा का कितना उपयोग किया जाता है।

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Frequently Asked Questions

What are the important topics in Proportional Reasoning-2 for CBSE Class 8 Mathematics?
Proportional Reasoning-2 covers several key topics that are frequently asked in CBSE Class 8 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Proportional Reasoning-2 — CBSE Class 8 Mathematics?
Understand the core concepts first, then work through the 55 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.
How many flashcards are available for Proportional Reasoning-2?
There are 76 flashcards for Proportional Reasoning-2 covering key definitions, formulas, and concepts. Use them daily for 10–15 minutes for best results.

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