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NUMBER PYRAMID
In a number pyramid, the number in each space is 9
the sum of the two numbers below it. 5 4
Start with a space, which has two filled adjoining
spaces below it. 3 2 2
Here blue circle is the sum of two green circles. 2 1 1 1
Therefore, blue circle is 2 + 1 = 3.
We can get the remaining numbers by following the same pattern.
NUMBER GRID
In a number grid each grid is replaced by the value of its result. Let us start filling
the numbers in the grid by solving each grid.
We usually start with the number at the centre. Here, it is 30.
10 less
than 30
1 more
1 less than
than 30 10+20 30 30
10 more
than 30
Now, fill the remaining places in the grid according to the instruction given in
each box.
SECRET MESSAGE: DECODING
Decoding is the process of converting a hidden message to a meaningful
text. The hidden message or secret message can be in the form of a symbol,
number, picture, letter, or a pattern.
For example, if 1 2 3 then the secret message
will be decoded as 132112.
Reasoning and Analysis 77

