# Algebra Question 1b

1. Which of the following are irrational numbers?

1. Which of the following are irrational numbers?

b) j) -1

b) yes j) no

1. Which of the following are irrational numbers?

j) -1

Solution: b) Yes, 3 is not a perfect square.

j) No,

Definition:

• Natural numbers (N)  =
• Whole numbers(W) (0,1,2,3, . . . ) \$
• Integers (Z)  =
• Fraction(F) (Numbers of the form , where a and b are whole numbers and . Whole numbers are fractions with b 1.)
• Rational numbers(Q)  =  (Numbers of the form , where a and b are integers and . All integers are rational numbers with b 1.)
• Irrational numbers  =  (All non-terminating, non-repeating numbers, such as , , the square roots of numbers which are not perfect squares.)