Which of the following numbers is an irrational number?

Question

slaaibak · Answer

the one which can't be expressed as a fraction. or m/n

meilendurcer · Answer

oh sorry i haven't put the answers up..one sec

anonymous · Answer

where n  not equal zero
 add this also 
 @slaaibak

meilendurcer · Answer

A. 42
B. 36
C. 0.5
D. 0.234

slaaibak · Answer

@RajshikharGupta well, anything over zero is not a number, and she asked which number is the irrational number, so that doesn't apply :) but i know what you mean.

slaaibak · Answer

The first one. 
A

do you want to know why?

anonymous · Answer

42^1/2 
i think

meilendurcer · Answer

ok

anonymous · Answer

42

anonymous · Answer

As noted above, irrational numbers can't be shown as a ratio of integers.  In practical terms, that means the decimal representation neither repeats nor terminates.  

Your other possible answers have decimal representations that terminate (b or c) or repeat (d).  

The square root of 42 can't be shown as a fraction.  It's decimal representation will neither repeat nor terminate.