Identify the most specific set to which each of the following numbers belongs:(5 points)

A. 6.263
B. 42−−√
C. 4.56666....
D. 0
E. 36−−−√
F. 9/11
G. -25
1. Irrational number
2. natural number
3. rational number
4. integer
5. whole number

1 answer

Let's categorize each number based on the sets provided:

A. 6.263

  • This is a decimal number that can be expressed as a fraction (6263/1000).
  • It is a rational number (3).

B. 42−−√ (the square root of 42)

  • The square root of 42 is not a perfect square and cannot be expressed as a fraction of integers.
  • It is an irrational number (1).

C. 4.56666.... (which indicates a repeating decimal)

  • This number can be expressed as a fraction (since it has a repeating decimal).
  • It is a rational number (3).

D. 0

  • Zero is an integer, a whole number, and can also be considered a rational number because it can be expressed as a fraction (0/1).
  • The most specific set is integer (4).

E. 36−−−√ (the square root of 36)

  • The square root of 36 is 6, which is a whole number and an integer.
  • The most specific set is natural number (2) (if we consider natural numbers as starting from 1, 6 is an integer; if natural numbers include 0, it still qualifies as an integer).

F. 9/11

  • This number is expressed as a fraction of two integers.
  • It is a rational number (3).

G. -25

  • This is an integer, but it is not a whole number or a natural number because negative numbers do not belong to those sets.
  • It belongs to the most specific set, which is integer (4).

So here is the final categorization:

A. 6.263 → 3 (rational number) B. 42−−√ → 1 (irrational number) C. 4.56666.... → 3 (rational number) D. 0 → 4 (integer) E. 36−−−√ → 2 (natural number) F. 9/11 → 3 (rational number) G. -25 → 4 (integer)