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In this chapter, we will explore how to think logically and solve problems.
Reasoning and analysis help us make better decisions and understand things

more clearly.

NUMBER PYRAMID

In a number pyramid, the number in each space is the sum of the two numbers
below it.

Start with a space, which has two filled adjoining spaces below it.

9

5 4

3 2 2

2 1 1 1

Here blue circle is the sum of two green circles.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.

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