Real and Complex Number quiz3 Updated: 06 May 2020 24 Welcome to your Ch # 2 Real and Complex Number quiz3 1. Q∩Q^{'}= Q Q' 0 All of these 2. The sum of two real number is also a real number is called _____ property w.r.t Addition. Closure Commutative Associative None of these 3. The ___ of two real number is also a real number is also called closure property. Product Commutative Associative None of these 4. Example of closure property ____. 7+9=16 7×9=63 Both a & b None of these 5. Commutative property w.r.t addition is ___. a+b=b+c a+c=b+c a+b+c=a+b a+b=b+a 6. Commutative property w.r.t multiplication is _____ ab = bc ac = bc abc = ab ab = ba 7. Commutative property is ____ a + b = b + a ab = ba Both a & b None of these 8. Associative property w.r.t Multiplication is ___. a(bc) = (ab)c (ab)c = a(bc) Both a & b None of these 9. Zero is called ____ w.r.t Additive Identity Additive Inverse Both None 10. a + 0 = 0 + a = a is Additive Identity Additive Inverse Both None of these 11. The product of real number and zero is ____. That Number Imaginary Zero None of these 12. 1 is called _______ w.r.t multiplication. Multiplicative identity Imaginary Multiplicative inverse None of these 13. a × 1 = 1 × a = a is _______ property. Multiplicative identity Imaginary Multiplicative inverse None of these 14. The product of 1 and a number is ____. 10 zero That number None of these 15. The sum of two numbers is zero (0) is called ____. Additive identity Additive Inverse Both None 16. If a+a^{'}=a^{'}+a=0 then a^{'} is called _______ of a. Additive identity Additive Inverse Both None of these 17. If a+(-a)=-a+a=0 then -a is called _______ of a. Additive identity Additive inverse Both None 18. The product of two number is 1 is called ___. Multiplicative identity Imaginary Multiplicative inverse None of these 19. If a.a^{-1}=a^{-1}.a=1 then a^{-1} is called ________ of a. Multiplicative identity Multiplicative Inverse Imaginary None of these 20. Multiplicative identity Imaginary Multiplicative inverse None of these Time is Up! Time's up

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