Page 128 - Revised Maths Wisdom Class - 3

126 MATHS

(d)

(e)

Number Patterns

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Numbers arranged in a series follow a patt ern. If we fi nd the patt ern in a number series,
we can write the next numbers in the same series.

Let us take a number series

1, 3, 5, 7, 9, 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.

Exercise 9B

1 Look for the patt ern and write the next 4 terms of the series in each of the following.

(a) 5, 15, 25, 35 _________, _________, _________, _________

(b) 20, 19, 18, 17 _________, _________, _________, _________
(c) 10, 20, 30, 40 _________, _________, _________, _________

(d) 35, 45, 55, 65 _________, _________, _________, _________
(e) 12, 17, 22, 27 _________, _________, _________, _________

2 Find the patt ern, and fi ll in the empty spaces in each of the following.

(a) 300, 400, _________, 600, _________, 800, 900
(b) 222, 225, _________, 231, _________, 237, 240

(c) 118, _________, 128, 133, _________, 143, 148

Tiling

Look at the given picture carefully.
You may observe the beautiful patt erns on walls and fl oor. These
are similar geometrical shapes placed without any gap. This is
called tiling. Each piece of geometrical shape is called a tile.