[Maths] What is the relationship between the numbers in the bottom row - Number Pyramids

part 2 - Question 2 - Page 139 - Number Pyramids - Chapter 6 Class 8 - Algebra Play (Ganita Prakash II) - Class 8 (Ganita Prakash - 1, 2 & Old NCERT)

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Question 2 - Page 139 What is the relationship between the numbers in the bottom row and the number at the top? What about a pyramid with three rows?Let’s consider a Pyramid with 2 rows Let bottom most numbers be a & b Then, Pyramid looks like Now, let’s consider a Pyramid with 3 rows Let bottom most numbers be a, b and c Then, Pyramid looks like

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