Name the set(s) of numbers to which each number belongs.?

Question

i.e. rational, irrational, integer, or a whole number

1) 9/10
2) -4
3) 18
4) 0.122333...

Answer 1

1) rational, real
2) integer, rational, real
3) whole, integer, rational, real
4) rational, real
For #4, I'm assuming that the 3 is repeating (since you have the dots at the end). If you can write the decimal as a fraction, then it is rational.
0.1223333333... can be written as 367/3000
Since the decimal can be written as a fraction, it is rational.

Answer 2

Most of the other people above are wrong. Rational numbers terminate (end somewhere). Irrational numbers don't terminate and can't be expressed as a fraction (never end; example: pi never ends). Integers can be negative and positive and must terminate at the decimal point. Whole numbers must be positive integers or 0.
1.) Real and rational (terminal; not an integer).
2.) Real, rational, and integer (terminal; no decimal but is negative).
3.) Real, rational, integer, and whole number (terminal; no decimal and is positive).
4.) Real and rational (can be expressed as 367/3000).

Answer 3

i.e. rational, irrational, integer, or a whole number

1) 9/10 raitonal
2) -4 integer
3) 18 whole number& integer
4) 0.122333... irrational

darn 10 seconds to late....

Answer 4

a belongs to the Z,Q,R,C. b belongs to N,Z,Q,R,C. c belongs to R,C, d belongs to C N=natural numbers Z=Integers Q=Rationals R=Reals C=Complex

Answer 5

1 rational
2 integer
3 whole number
4 irrational

Answer 6

rational .....(can be expressed as ratio of whole numbers)

integer.....(whole number, in this case negative)

integer

irrational....(cannot be expressed as ratio of whole numbers)

Answer 7

1. rational
2. integer
3. whole & integer
4. irrational (I think that's their intent)