ECAT Pre Engineering MCQ Test With Answer for Chapter 1 Mathematics

The set of positive integers, 0 and negative integers is known as the set of

• Natural numbers A
• Rational numbers B
• All integers C
• Irrational numbers D

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

Which element is the additive inverse of (a, b) in Complex numbers?

• (a, 0) A
• (0, b) B
• (a, b) C
• (-a, -b) D

Every prime number is also

• Rational number A
• Even number B
• Irrational number C
• Multiple of two numbers D

In R, the multiplicative identity is

• 0 A
• 1 B
• -1 C
• None D

6 is

• A prime integer A
• An irrational number B
• A rational number C
• An odd integer 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
• 
  E

• z is purely imaginary A
• a is any complex number B
• z is real C
• None of these D

i =

• √1 A
• √2 B
• √-2 C
• √-1 D

Name the property used in 4 x (5 x 8) = ( 4 x 5) x 8

• Associative property of addition A
• Associative property of multiplication B
• Additive identity C
• Multiplicative identity D

• 
  A
• 
  B
• 
  C
• 
  D

Associative law of multiplication

• ab - ba A
• a(bc) = (ab) c B
• a(b + c) = ab +ac C
• (a +b)c = ac + bc D

Q∪ Q' =

• Q A
• Q' B
• N C
• R D

• A prime number A
• An integer B
• A whole number C
• An irrational number D

The value of x, and y, when (x + iy)²= 5 + 4i

• X = 2, y = -1 A
• X = -2, y=1 B
• X = 2, y = -1 C
• X = 2, y = 2 D

Every real number is

• A complex number A
• A rational number B
• A natural number C
• A prime number D

14 is not a

• Prime number A
• Whole number B
• Even number C
• Real number D

In (x + iy), y is called as

• Imaginary part A
• Complex number B
• Real part C
• None of above D

Every irrational number is

• A real number A
• A prime number B
• A natural number C
• An integer D

• 0 A
• 1 B
• -1 C
• 2 D

Multiplicative inverse of 0 is

• 0 A
• 1 B
• ±1 C
• Does not exist D

• 
  A
• 
  B
• 
  C
• 
  D

The set of rationals numbers between 0 and I is

• Finite A
• Null set B
• Infinite C
• None of these D

1.4142135... is ______

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

√25 is a number

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

• 
  A
• 
  B
• 
  C
• 
  D

In set builder notation the set {0,1,2,........100} can be written as

• {x / xε B ∧ x ≤ 100} A
• {x / x ∈ W ∧ x < 101} B
• {x / x ∈ Z ∧ x < 101} C
• The set of first 100 whole numbers D

Which of the following has the same value as i¹¹³?

• i A
• -1 B
• -i C
• 1 D

∀x,y∈ R and x < 0, y < 0, which one is true 

• xy < o A
• xy = o B
• xy > o C
• None of these D