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## ekShiksha : Privacy Setting

# 10. Play with Patterns

## Patterns Around Us

In everyday life, we see many patterns.

For example, we see:

Look around you and list three things in which you find some pattern.---------------,------------------,----------------------

Draw some patterns which you have found around yourself.She makes these designs by using blocks again and again. One day I got hold of the blocks and made a beautiful design

You will see that these designs have been made by using the same block in different ways.

Can you see a pattern in the way each block is repeated?

## Pictures in a Pattern

## Growing Patterns

Can you see the rule and continue the pattern?

Try these also.

## My Own Patterns

Here is your space to make your own patterns:

Ask your friends to continue the patterns made by you.

This chapter helps children observe and understand patterns around them. They can be given more examples of repeating or growing patterns to recognise the motif or basic unit which generates the patterns. Making secret messages or codes also helps pattern recognition. As their algebraic thinking develops, they will realise that the pattern created by the rule boy boy girl is the same as A A B or ↑↑. Some interesting and important number patterns that relate to mathematical operations are given. |

## Secret Messages

Amrita and Paritosh are writing secret messages.

Can you tell what they are trying to say?

These are two secret messages. Look for the patterns and find the hidden sentences.

Now you also make your own secret messages.

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## Even and Odd Number Patterns

91 | 92 | 93 | 94 | 95 | 96 | 97 | 98 | 99 | 100 |

81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 90 |

71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 |

61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 |

51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | 60 |

41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 |

31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 |

21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |

11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |

1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |

Half these numbers are in yellow. What patterns do you see in these numbers? Continue the same pattern and fill in the blanks:

96, 98, , 102,,,,.

How far can you continue this pattern?

These numbers have a special name. They are called even numbers.

Do any of these even numbers end with 3 or 5?

What do even numbers end with?

Look at the pattern of numbers in blue. Continue the pattern and fill in the blanks:

99, 101, , 105, 107,,
,

What do the numbers in blue end with?

All numbers that end with 1, 3, 5, 7 or 9 are called odd numbers.

Write all odd numbers between 400 and 410.

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Write all even numbers between 155 and 165.

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If we add 1 to any odd number we get an (even/odd) number.

If we add 1 to any even number we get an (even/odd) number

What do you get if you add an even number to an odd number?

## Names in an Order

Adil has to arrange this list so that the names starting with A come first and then come those with B, C, D and so on. Number these names in the order in which they will come.

Sharadha | Mahadevan | Tsering | Adil | ||||||

Gurinder | Baichung | Harsha | Raja | ||||||

Narayan | Kavita | Warsha | Elvis | Jalaj |

Jalaj is proud to have a special name. He says if you read it backwards it is still the same.

Which of the following names have the same pattern? Mark √.

Harsh, Anna, Kanak, Munna, Ongbi