The largest fish in the world is the whale shark. It can weigh several tons and grow to more than fifty feet in length.

In Japan, tipping at restaurants is not a norm. However, some restaurants might add a 5 - 10 % service charge to the bill.

The number Pi (the ratio of the circumference to the diameter of a circle) can't be expressed as a fraction, this means it is an irrational number. When written as a decimal it never repeats and never ends.

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