ECAT Pre Engineering MCQ Test With Answer for Chapter 1 Mathematics

What is the conjugate of -6 -i?

• -6 +i A
• 6+i B
• -6 -i C
• 6 -i D

Union of the sets of rational and irrational numbers is called 6th set of

• Natural numbers A
• Real numbers B
• Whole numbers C
• Prime numbers D

The√ is used for the

• Positive square root A
• Negative square root B
• +ve and -ve square root C
• Whole number D

If in a set of real no a is additive identity then

• a+a = 2a A
• a+a = 1 B
• a+a = 0 C
• None of these D

• 
  A
• 
  B
• 
  C
• 
  D

The identity element with respect to subtraction is

• 0 A
• 1 B
• -1 C
• Does not exist D

1/3 is a decimal

• Recurring A
• Terminating B
• Non-terminating C
• None of the above D

If a is any real number and a = a is called

• symmetric property A
• Trichotomy Properties B
• Transitive Property C
• Reflexive Properties D

Name the property used in 100 + 0 = 100

• Additive inverse A
• Multiplicative inverse B
• Additive identity C
• Multiplicative identity D

√25 is a number

• Rational A
• Irrational B
• Natural C
• Odd D

The set of rational number is represented by

• W A
• R B
• Q' C
• Q
  
  
  D

• Principle of equality of fractions A
• Rule for product of fraction B
• Rule for quotient of fraction C

• real part of z A
• imaginary part of z B
• conjugate of z C
• modulus of z D

The set {1, 2, 3, 4, ....} is called

• Set of Natural numbers A
• Set of whole numbers B
• Set of rational number C
• Set of irrational numbers D

• 
  A
• 
  B
• 
  C
• 
  D

• 
  A
• 
  B
• 
  C
• 
  D

• Rational A
• Irrational B
• Natural C
• Odd D

i² = 

• 1 A
• 2 B
• -1 C
• 0 D

• Additive property of inequality A
• Commutative property B
• Additive inverse C
• Additive identity D

2.333....is a

• Irrational no A
• Complex no B
• Rational no C
• None of these D

√2 is a number

• Rational A
• Irrational B
• Even C
• Odd D

• A rational number A
• An irrational number B
• An odd number C
• A prime number D

QUQ, =

• N A
• R B
• W C
• Z D

• 
  A
• 
  B
• 
  C
• 
  D

Name the property used in a (b-c) = ab - ac

• commutative property of multiplication A
• distributive property of multiplication B
• associative property of multiplication C
• multiplicative inverse D

• additive property A
• multiplicative property B
• additive inverse C
• additive identity D

(a^-1)^-1=

• a^-1 A
• a B
• -a C
• None of above D

i =

• 
  A
• 
  B
• 
  C
• 
  D

What is the conjugate of -7 -2i ?

• -7 + 2i A
• 7 +2i B
• 7 -2i C
• √53 D

The square root of 2i - 20i is

• ±(5 - 2i) A
• ±(5+ 2i) B
• (5 - 2i) C
• None of these D