Playing with Numbers

This topic elaborates on the divisibility rule for various numbers. The divisibility rule for 2 is explained through a chart. It also explains the divisibility rules for the numbers 3, 6, 9, 5, and 10. Some questions also given here for practice.

In this topic, the concept of factors and common factors is explained via grouping of bangles followed by a multiplication chart. Next, we are encouraged to find out factors for a number by drawing a factor tree. This is followed by some word problems.

This topic discusses the prime numbers, which are the numbers that can be only divided by one and the number itself, e.g., 2, 3, 5, 7, and 11. On the other hand, the numbers which can be divided by other numbers too are composite numbers.

This topic helps students in understanding and solving HCF and LCM problems using the prime factorisation method and the fundamental theorem of arithmetic. This is explained using the aid of solved examples and word problems.

Within this topic, we will learn about the common factors. We will study the different types of common factors. The different ways of finding these factors are also discussed here with the help of several examples.

This topic discusses the highest common factor and the least common multiple. It describes the different methods of finding the HCF and LCM of the numbers with the help of several steps. Some questions are also given here for practice.

This topic gives us a brief on the divisibility rule of 4, 8, and 11. It explains how the rules of the three numbers are linked with each other and how to apply these rules. It also describes the number that is exactly divided by the given number.