Which statement is true?
Every real number is an integer.
Every rational number is a real number.
Every rational number is a perfect square.
Every integer is an irrational number.

Question

Which statement is true? 
Every real number is an integer.
Every rational number is a real number.
Every rational number is a perfect square.
Every integer is an irrational number.

anonymous · Answer

the second option is the right answer

anonymous · Answer

do you understand what real numbers, rational numbers and integers are? you should check what each means and then this becomes blatantly obvious. the answer is b because real numbers are anything from -infinity to +infinity.

anonymous · Answer

The best idea is to look for a counter-example for each... if you find one, it can't be true.

Every real number is an integer?    How about 2.5?  Real, not an integer.
Every rational number is a real number?  Sounds promising... let's move on.
Every rational number is a perfect square?   3 is rational, 3 is NOT a perfect square.
Every integer is irrational.  This is just obvious if you know what integers and irrational numbers are.

Therefore, the 2nd answer must be it.

However, you need to be able to reason through these on your own, rather than letting your OS helpers just hand you answers...