Page 70 - Code & Click - 2

Example: Observe the series of numbers given below and write the next
three terms:

3, 6, 9, 12, 15
Solution: You can observe that each number in the series is obtained by

adding 3 to the previous number. Thus, the rule for the series is +3. Using
this rule, the next three items in the series will be 18 (15 + 3), 21 (18 + 3),

and 24 (21 + 3).

Shapes in Shapes

There are different geometrical shapes such as rectangle, triangle, circle, and
oval. Some shapes can be seen inside other shapes.

Example: Observe the given figure and count the number of triangles in it.

5

2 1 3

6 4 7

Solution: There are 9 triangles in the figure - 4 small triangles marked 1 - 4, 4
medium triangles, and 1 large triangle marked in blue outline.

Coding-Decoding

Coding-Decoding is the process of substituting the letters of a word with
some other letters according to a certain rule. To get back the original word,

you have to apply the rule to the coded word in reverse order.

Example: The word PRINTER is coded as QSJOUFS in a certain code language.
Write the code for the word MONITOR using the same code language.

Solution: If you match the letters of the word PRINTER with QSJOUFS, we find
that each letter of PRINTER is replaced with its next letter in the alphabet.
Thus, A is replaced with B, B with C, C with D, and so on. Thus, the code for

MONITOR will be NPOJUPS.

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