Math 11 Chapter 2Number SystemTest - 13

Math 11 Chapter 2
Number System
Test - 13

1. The set {I, -1} posses closure property w.r.t………

a) Addition
b) Subtraction
c) None
d) Multiplication

2. When a and a-1 are multiplicative inverses, then?

a) (a-1)-1 = 1/a2
b) (a-1)-1 = 1/a
c) (a-1)-1 = a
d) (a-1)-1 = a-2

3. Simplify (-i)9?

a) -i2
b) -i
c) -1
d) i

4. Simplify (0,3) (0, 5)?

a) (-5,0)
b) (0,-15)
c) (-15,0)
d) (0, 15)

5. The inverse of element a != 0 with respect to multiplication is?

a) 1
b) -a
c) 0
d) 1 /a

6. The set {1, - 1 } possesses closure property with respect to addition.

a) False
b) True

7. Z – Z = ………………..

a) -1
b) 0
c) Real number
d) Complex number

8. The property used in the equation 4+0 = 4 is?

a) Additive inverse
b) Commutative
c) Additive identity
d) Associative

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