4.7 Ans Key

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1.a 2,3,6

1b. 2,4, 5, 8, 10

2a. True and explanation

2b. True and explanation

3a. 2² • 3² • 23

3b. 2² • 5³ • 23

5a. 39

5b. 1 

6. 1.2222...

7. n= 734/999

8a. Natural #'s √25

8b. Whole #'s 0, √25

8c. Integers -5, 0, √25

8d. Rational #'s -5, -1/5, 0, 0.14, 9.8, √25

8f. Real #'s  all

8e. √15

Last modified: Monday, 21 November 2016, 3:13 PM