Maths joke

What is Pi?

A mathematician: “Pi is the ratio of the circumference of a circle to its diameter.”
A computer programmer: “Pi is 3.141592653589 in double precision.”
A physicist: “Pi is 3.14159 plus or minus 0.000005.”
An engineer: “Pi is about 22/7.”
A nutritionist: “Pie is a healthy and delicious dessert!”

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