CBSE Class 6 Mathematics Question 23 of 25

Patterns in Mathematics — Question 25

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25
Question
How many little squares are there in each shape of the sequence of Stacked Squares? Which number sequence does this give ? Can you explain why?
Answer

There are 1,4, 9, 16, 25 little squares, respectively in each of the sequence of stacked squares.
This gives a sequence of squares.
Reason
1 = 1
1 + 2 + 1 = 4
1 + 2 + 3 + 2 + 1 = 9
1 + 2 + 3 + 4 + 3+ 2 + 1 = 16
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and so on.