Page 122 - Maths Skill - 3

120 Maths

2. Complete the following repeated patterns.

(a)

(b)

(c)

(d)

Number Patterns

Numbers, arranged in a series, follow a pattern. If we find the pattern in a number series,
then we can write the next numbers in the same series.

Let’s Attempt

Example: Look for the pattern and write the next three terms of the pattern.
(a) 1, 3, 5, 7, 9, 11, ____, ____, ____ (b) 24, 21, 18, 15, 12, ____, ____, ____

(c) 1, 2, 4, 8, 16, ____, ____, ____

Solution: (a) 1 +2 3 +2 5 +2 7 +2 9 +2 11

Here, we see that the next number is two more than the previous number.
So, the next 3 numbers in this number series will be 13, 15 and 17.

(b) 24 –3 21 –3 18 –3 15 –3 12

Here, we see that the next number is 3 less than the previous number.
So, the next 3 numbers in this series will be 9, 6 and 3.

(c) 1 ×2 2 ×2 4 ×2 8 ×2 16

Here, we see that the next number is obtained by multiplying the
previous number by 2. So, the next numbers in this series will be 32, 64

and 128.

Exercise 9.2

1. Complete the following number patterns.

(a) 2, 4, 6, 8, ______, ______, ______, ______, ______, ______

(b) 3, 7, 11, 15, ______, ______, ______, ______, ______, ______