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Let us now learn about number pyramid, number grid and decoding in this
chapter.

Number Pyramid

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

below it.

Start with a circle, which has two filled adjoining circles below it.
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.

9

5 4

3 2 2

2 1 1 1

In a number pyramid, you add the numbers below to find the number above.

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.

Reasoning and Analysis 37