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Number System

ICSE · Class 6 · Mathematics

Flashcards for Number System — ICSE Class 6 Mathematics. Quick Q&A cards covering key concepts, definitions, and formulas.

90 questions28 flashcards5 concepts

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28 Flashcards
Card 1Place Value

What is the place value of 7 in 4,73,892?

Answer

Step 1: Identify the position of 7 → It is in the ten thousands place. Step 2: Multiply digit by its place value → 7 × 10,000 = 70,000. Answer: The place value of 7 is 70,000.

Card 2Face Value

What is the face value of 5 in 8,59,321?

Answer

Face value is the digit itself, regardless of position. So, the face value of 5 is simply 5.

Card 3Comparing Numbers

Compare 63,452 and 63,542 using a place value chart.

Answer

Step 1: Write both numbers in a place value chart: | TTh | Th | H | T | O | |-----|----|---|---|---| | 6 | 3 | 4 | 5 | 2 | | 6 | 3 | 5 | 4 | 2 | Step 2: Compare from left to right. - Ten Thous…

Card 4Forming Numbers

Form the smallest 5-digit number using digits 3, 0, 7, 2, 9 without repetition.

Answer

Step 1: Smallest digit other than 0 is 2 → place at leftmost. Step 2: Then place 0, followed by remaining digits in ascending order: 3, 7, 9. So, the number is 20,379. Note: Cannot start with 0.

Card 5Forming Numbers

Form the greatest 6-digit number using digits 1, 0, 4, 8, 5, 2 without repetition.

Answer

Step 1: Arrange digits in descending order: 8, 5, 4, 2, 1, 0. Step 2: Place largest digit first, then others in descending order. So, the number is 8,54,210.

Card 6Number Formation

What is the smallest 5-digit number?

Answer

To form the smallest 5-digit number, use 1 followed by four 0s. Answer: 10,000.

Card 7Number Formation

What is the greatest 6-digit number?

Answer

To form the greatest 6-digit number, use 9 in all places. Answer: 9,99,999.

Card 8Addition of Large Numbers

Add: 3,45,678 + 2,89,437

Answer

Step 1: Align numbers by place value: 3,45,678 + 2,89,437 __________ Step 2: Add column by column from right to left: - Ones: 8 + 7 = 15 → write 5, carry 1 - Tens: 7 + 3 + 1 = 11 → write 1, carry …

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Frequently Asked Questions

What are the important topics in Number System for ICSE Class 6 Mathematics?
Key topics in Number System include Number System Concepts Map, Mind map showing the 10 basic digits and how they can be used to form numbers, Flowchart showing how place value breaks down a number into its component positions. These are the concepts ICSE Class 6 examiners draw on most — study them first, then practise related questions.
How to score full marks in Number System — ICSE Class 6 Mathematics?
Understand the core concepts first, then work through the 90 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 Number System?
There are 28 flashcards for Number System covering key definitions, formulas, and concepts. Use them daily for 10–15 minutes for best results.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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