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3 Factors and

Multiples

Learning Objectives Scan to learn

After studying this chapter, students will be able to…
( find the factors and multiples of numbers
( identify the numbers divisible by 2, 3, 4, 5, 6, 8, 9, 10, and 11 without dividing them
( identify prime and composite numbers
( find the prime factors of a number using factor tree and prime factorisation method
( find the common factors and HCF of numbers
( find the common multiples and LCM of numbers
( understand the properties of HCF and LCM

get reAdy!

The controller sets the
We are waiting for
so long on this signal. timings of the traffic signals in
When this red light such a way that all the lights
will turn green? are not lighting up at one time
by exercising the concept of
LCM and HCF.

What is
LCM?

Is it possible that
all the traffic
signals turn green
at the same time?

58 Mathematics-5