Mathematics Class 6 English

  CBSE Worksheet 01 Ch-2 Whole Numbers What is the successor of 2001? (a)  2003  (b)  2001 (c)   2002 (d)  2000 Which natural number has no predecessor? 1 2 None of these 0 Which is the smallest whole number? (a)  0  (b)  2  (c)  1 (d)   None of these Study the pattern: 1  × ×  8 + 1 = 9 12  × ×  8 + 2 = 98 120  × ×  8 + 3 = 963 None of these 123  × × 8 + 3 = 987 1234  × ×  8 + 4 = 9876 460 ___ 406 = None of these > < Match the following Column A Column B 1. Commutative property a. (a × b) × c = a × (b × c) 2. Associative Property b. a (b + c) = ab + ac 3. Identity for multiplication c. a + b = b + a 4. Distributive Property d. a × 1 = a Fill up the following: Division by _____ is not defined. A number remains unchanged when added to ______. A number remains unchanged when multiplied to ______. 13 × 100 × ________ = 1300000 State true or false: All natural numbers are whol...

  CBSE Class 6 Mathematics Revision Notes CHAPTER – 3 Playing WITH NUMBERS We have discussed multiples, divisors, factors and have seen how to identify factors and multiples. We have discussed and discovered the following: (a)  A factor of a number is an exact divisor of that number. (b)  Every number is a factor of itself. 1 is a factor of every number. (c)  Every factor of a number is less than or equal to the given number. (d)  Every number is a multiple of each of its factors. (e)  Every multiple of a given number is greater than or equal to that number. (f)  Every number is a multiple of itself.   We have learnt that – (a)  The number other than 1, with only factors namely 1 and the number itself, is a prime number. Numbers that have more than two factors are called composite numbers. Number 1 is neither prime nor composite. (b)  The number 2 is the smallest prime number and is even. Every prime number other than 2 is odd. (c) ...

  CBSE Class –VI Mathematics NCERT Solutions Chaper 3 Playing With Numbers (Ex. 3.1) Question 1. Write all the factors of the following numbers: (a) 24, (b) 15, (c) 21, (d) 27, (e) 12, (f) 20 , (g) 18, (h) 23, (i) 36 Answer:  (a) 24 = 1 x 24 = 2 x 12 = 3 x 8 = 4 x 6 = 6 x 4 ∴ ∴  Factors of 24 = 1, 2, 3, 4, 6, 12, 24 (b) 15 = 1 x 15 = 3 x 5 = 5 x 3 ∴ ∴  Factors of 15 = 1, 3, 5, 15 (c) 21 = 1 x 21 = 3 x 7 = 7 x 3 ∴ ∴  Factors of 21 = 1, 3, 7, 21 (d) 27 = 1 x 27 = 3 x 9 = 9 x 3 ∴ ∴  Factors of 27 = 1, 3, 9, 27 (e) 12 = 1 x 12 = 2 x 6 = 3 x 4 = 4 x 3 ∴ ∴  Factors of 12 = 1, 2, 3, 4, 6, 12 (f) 20 = 1 x 20 = 2 x 10 = 4 x 5 = 5 x 4 ∴ ∴  Factors of 20 = 1, 2, 4, 5, 10, 20 (g) 18 = 1 x 18 = 2 x 9 = 3 x 6 ∴ ∴  Factors of 18 = 1, 2, 3, 6, 9, 18 (h) 23 = 1 x 23 ∴ ∴  Factors of 23 = 1, 23 (i) 36 = 1 x 36 = 2 x 18 = 3 x 12 = 4 x 9 = 6 x 6 ∴ ∴  Factors of 36 = 1, 2, 3, 4, 6, 9, 12, 18, 36 Question 2. Write first five multiples of: (a) 5, (b) 8, (c...