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About Whole Numbers — Class 6 CBSE

Explore properties of whole numbers including successor, predecessor, number line representation, and patterns. This topic is part of the CBSE Class 6 mathematics syllabus (chapter: Chapter 2 (NCERT)). On this page you can practice 60 questions across three difficulty levels — 20 easy, 20 medium, and 20 hard — each with a visual step-by-step solution, plus a timed 35-question mastery test with a live leaderboard. Worked examples and sample questions from the topic are below.

What you'll learn in Whole Numbers

  • What are Whole Numbers?
  • Number Line and Successor-Predecessor
  • Properties of Addition and Subtraction
  • Properties of Multiplication and Division
  • Patterns in Whole Numbers

Interactive lesson · about 20 minutes · checkpoint question after every unit

Whole Numbers — solved examples for Class 6 CBSE

Example 1easy

Which is the smallest whole number?
  1. A)1
  2. B)0
  3. C)-1
  4. D)10

Step-by-step solution

  1. Whole numbers are: 0, 1, 2, 3, ...
  2. The smallest whole number is 0.

Answer: 0

Example 2medium

Use the distributive property to find: 35 × 102
  1. A)3,570
  2. B)3,500
  3. C)3,670
  4. D)3,270

Step-by-step solution

  1. 35 × 102 = 35 × (100 + 2)
  2. Distribute:
    35×100+35×2=3,500+70=3,57035 × 100 + 35 × 2 = 3,500 + 70 = 3,570

Answer: 3,570

Example 3hard

Find the value of: 16 × 25 × 125 × 5
  1. A)2,50,000
  2. B)2,00,000
  3. C)1,50,000
  4. D)3,00,000

Step-by-step solution

  1. Rearrange:
    (16×125)×(25×5)(16 × 125) × (25 × 5)
  2. 16 × 125 = 2,000 and 25 × 5 = 125
  3. Result:
    2,000×125=2,50,0002,000 × 125 = 2,50,000

Answer: 2,50,000

Practice questions on Whole Numbers

  1. Q1.easy

    What is the successor of 17?
    1. A)16
    2. B)17
    3. C)18
    4. D)19
    Show answer

    Answer: 18

    Hint: Successor means the number that comes just after.

  2. Q2.easy

    What is the predecessor of 50?
    1. A)49
    2. B)51
    3. C)48
    4. D)50
    Show answer

    Answer: 49

    Hint: Predecessor means the number that comes just before.

  3. Q3.easy

    Find: 345 + 0
    1. A)0
    2. B)345
    3. C)346
    4. D)344
    Show answer

    Answer: 345

    Hint: Adding 0 to any number gives the same number.

  4. Q4.medium

    Find the value of: 297 × 18 + 297 × 2
    1. A)5,940
    2. B)5,840
    3. C)5,900
    4. D)6,000
    Show answer

    Answer: 5,940

    Hint: Take 297 as common and use the distributive property.

  5. Q5.medium

    Find: 25 × 36 × 4
    1. A)3,600
    2. B)2,400
    3. C)3,000
    4. D)4,200
    Show answer

    Answer: 3,600

    Hint: Rearrange: multiply 25 × 4 first.

  6. Q6.medium

    What is the pattern rule for: 3, 6, 12, 24, 48, ...?
    1. A)Add 3
    2. B)Multiply by 2
    3. C)Add 6
    4. D)Multiply by 3
    Show answer

    Answer: Multiply by 2

    Hint: Look at the ratio between consecutive terms.

  7. Q7.hard

    The product of two whole numbers is 0. If one of them is 7, what is the other?
    1. A)0
    2. B)1
    3. C)7
    4. D)Cannot determine
    Show answer

    Answer: 0

    Hint: If a product is 0, at least one factor must be 0.

  8. Q8.hard

    Find the sum: 1 + 2 + 3 + ... + 50
    1. A)1,275
    2. B)1,250
    3. C)1,225
    4. D)1,300
    Show answer

    Answer: 1,275

    Hint: Use Gauss's formula: sum = n(n+1)/2.

  9. Q9.hard

    A shopkeeper buys 125 pens at ₹8 each and sells them at ₹12 each. What is his total profit?
    1. A)₹400
    2. B)₹500
    3. C)₹600
    4. D)₹375
    Show answer

    Answer: ₹500

    Hint: Profit per pen = selling price - cost price. Total profit = profit per pen × number of pens.

These are 9 of the 60 questions available for Whole Numbers. Start practicing above to unlock visual solutions, AI coaching, and the topic leaderboard — completely free.