Real Numbers,Polynomials,Pair of Linear Equations in Two Variables,Quadratic Equations,Arithmetic Progressions,Triangles, Coordinate Geometry,Introduction to Trigonometry,Some Applications of Trigonometry,Circles,Constructions,Areas Related to Circles,Surface Areas and Volumes Statistics,Probability,Roman Numbers.
Class 6 Playing with Numbers ex 3.5 Q1. Which of the following statements are true? (a) If a number is divisible by 3, it must be divisible by 9. (b) If a number is divisible by 9, it must be divisible by 3. (c) A number is divi…
Class 6 Playing with Numbers ex 3.4 Q1. Find the common factors of: (a) 20 and 28 (b) 15 and 25 (c) 35 and 50 (d) 56 and 120 Solutions: (a) 20 and 28 1, 2, 4, 5, 10 and 20 are factors of 20 1, 2, 4, 7, 14 and 28 are factors of …
Class 6 Playing with Numbers ex 3.3 Q1. Using divisibility tests, determine which of the following numbers are divisible by 2; by 3; by 4; by 5; by 6; by 8; by 9; by 10; by 11 (say, yes or no): Q2. Using divisibility tests, dete…
Class 6 Playing with Numbers ex 3.2 Q1. What is the sum of any two (a) Odd numbers? (b) Even numbers? Solutions: (a) The sum of any two odd numbers is even numbers. Examples: 5 + 3 = 8 15 + 13 = 28 (b) The sum of any …
Playing with Numbers Ex 3.1 Q1. 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 Solutions: (a) 24 24 = 1 × 24 24 = 2 × 12 24 = 3 × 8 24 = 4 × 6 24 = 6 × 4 Hence, the…
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