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Example: Find the value of P in the following pattern:

5, 9, 13, 17, P, 25
Solution: Given pattern: 5, 9, 13, 17, P, 25

Here, the number is increasing by 4.
The number before P is 17. So, P will be 17 + 4 = 21.

Practice time 12

1. Complete the patterns by drawing pictures.

(a)

r S t r S t
(b)

(c)

(d)

2. Write the correct numbers to complete the patterns.
(a) 3, 5, 7, 9, 11, ___, ___, ___, ___

(b) 5, 10, 15, 20, 25, ___, ___, ___, ___

(c) 10, 20, 30, 40, 50, ___, ___, ___, ___

(d) 51, 50, 49, 48, 47, ___, ___, ___, ___

(e) 23, 25, 27, 29, 31, ___, ___, ___, ___
(f) 22, 21, 20, 19, 18, ___, ___, ___, ___

Life Skills

We make a rangoli for a festival. Trace the designs given below on a
sheet of paper and colour them beautifully.
(a) (b)

156 Mathematics-1