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1. ১, ৪, ৯, ১৬,___, ৩৬, ৪৯ শুন্যস্থানে কোন সংখ্যাটি বসবে?

  • A. 18
  • B. 18
  • C. 18
  • D. 18

Answer: Option D

Explanation:

This is a pattern of square numbers.

1^2 = 1,

2^2 = 2,

3^2 = 9,

4^2 = 16, and

5^2 = 25.

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