An irrational number can become rational by dropping a few decimal places?

An irrational number can become rational by dropping a few decimal places.

Ans 2.

An irrational number can produce a rational by being truncated as desired.

The square root of 2 is often truncated to 1.414, and is useful in all sorts of technologies at that accuracy. However, it is no longer the square root of 2 !

It is often a useful approximation, but to a mathematician it is a queer duck.