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1 . What is the next number in the series 1.4.9 ?

A. 12
B. 16
C. 25
D. 28

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Answer: Option B

Explanation:

When you multiply a whole number times itself, the resulting product is called a square number, or a perfect square or simply "a square." So 1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, and so on, are all square numbers.

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