Q. Consider the following statements:
1.Pi is a rational number.
2.Pi day has been marked as International Day of Mathematics.
3.Pi is a mathematical constant that represents the ratio of the circumference of a circle to its diameter. 
Which of the statements given above are correct?

[A] 1 and 2 only

[B] 2 and 3 only

[C] 1 and 3 only

[D] 1, 2 and 3

Answer: B
Notes:

Explanation –

Statement 1 is incorrect. Pi is an infinitely long, irrational number, and its exact value cannot be known. Pi is roughly equal to 3.14 or 22/7.

Statement 2 and 3 are correct. Pi day has been marked as International Day of Mathematics. Pi is a mathematical constant that represents the ratio of the circumference of a circle to its diameter.

Source: ForumIAS

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