ECAT Pre Engineering MCQ Test With Answer for Chapter 1 Mathematics

√25 is a number

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

i² = 

• 1 A
• 2 B
• -1 C
• 0 D

For each real number, there is a number which is its

• Negative A
• Possitive B
• Opposite C
• Similar D

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

The multiplicative inverse of 0 is

• 1 A
• -1 B
• 0 C
• Does not exist D

i³=

• -1 A
• i B
• -i C
• 1 D

• Set of whole number A
• Rational Numbers B
• Complex numbers C
• Whole numbers D

In R, the additive inverse of a is

• 0 A
• 1 B
• -a C
• 1/a D

• Reflexive property A
• Symmetric property B
• Transitive property C
• Additive property D

The square root of every incomplete square is an

• Rational numbers A
• Even numbers B
• odd numbers C
• Irrational numbers D

• Principle of equality of Fractions A
• Rule for product of fraction B
• Golden rule of fraction C
• Rule of quotient of Fraction D

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

The set of rationals numbers between 0 and I is

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

A prime number can be a factor of a square only if it occurs in the square at least

• Once A
• Thirce B
• Twice C
• None of these D

The multiplicative inverse ofx^(-1) is

• x A
• a-2 B
• 0 C
• 1 D

• 
  A
• 
  B
• 
  C
• None of these D

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

There is no element common in

• N and W A
• E and W B
• N and O C
• Q and Q' D

π is the ration of

• Area of a circle to its diameter A
• Area of a circle to its radius B
• Circumference of a circle to its diameter C
• Circumference of circle to its radius 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

• Reflexive property A
• Symmetric property B
• Cancellations property w.r.t. addition C
• Transitive property D

For any real numbers x,y,xy=o ⇒

• x ≠ 0 ∧ y ≠ 0 A
• x = 0 ∨ y = 0 B
• x = 0 C
• y = 0 D

Every prime number is also

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

What is the conjugate of -7 -2i ?

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

a.a^-1 = a^-1.a = 1 is a

• Commutative law of multiplication A
• Multiplicative identity B
• Associative law of multiplication C
• Multiplicative inverse 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

• 
  A
• 
  B
• 
  C
• 
  D

If A = {x / x ∈ R ∧ x² - 16 = 0} then A =

• - x A
• Infinite set B
• Φ C
• {-4,4} D

• 
  A
• 
  B
• 
  C
• 
  D

1.4142135... is ______

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