Page 210 - ICSE Math 5

2. Use the following codes to decode the given message.

A B C D E F G H I J K L M N
0 2 4 6 8 10 12 14 16 18 20 22 24 26

O P Q R S T U V W X Y Z
28 30 32 34 36 38 40 42 44 46 48 50

Message: 38 14 8 32 40 16 4 20 2 34 28 44 26 10 28 46 18 40 24 30 36
28 42 8 34 38 14 8 22 0 50 48 6 28 12

3. Make patterns of the following triangular numbers.
(a) 21 (b) 15 (c) 36

4. Make patterns of the following square numbers.
(a) 25 (b) 36 (c) 49

5. Count the number of dots in the given triangular and square patterns. Write the
triangular and square numbers they represent.
(a) (b) (c) (d)

ACTIVITY

What To Do?

To create patterns with a unit of repeat and their extension
What We Need?

Blackboard/whiteboard and chalk marker
How To Do?
 Divide the students into groups of 2–3 each.
 One member from each group will come forward and draw a repeating pattern on the

board.
 One member from the other group will come forward to identify the unit of repeat and

extend it.
 Continue the activity until each member from all the groups get a chance to draw a
repeating pattern, identify the unit of repeat and extend it.

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