To answer the items correctly, you need to be familiar
with the terminology of numbers. These terms appear in a majority
of all SAT Math items, not just the ones dealing with numbers &
Number Terms and Definitions
||The set of numbers we use to
||0, 1, 2, 3
||The set of all whole numbers,
||1, 2, 3, 4, 5, 6
||The set of all positive and negative
whole numbers, including zero. No fractions.
||–2, –1, 0, 1, 2, 3
||The set of numbers that can
be expressed as integers in fractions, in the form m/n,
where m and n are integers.
||The set of all numbers that cannot
be expressed as integers in a fraction.
||Every number on the number line.
The set of real numbers includes all rational and irrational numbers.