ECAT Pre General Science MCQ Test With Answer for Mathematics Chapter 1

3/4 is ______

• An odd number A
• An even number B
• A natural number C
• A rational number D

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

The negative square root of 9 can be written as:

• -√9 A
• √9 B
• √18 C
• -√18 D

• 
  A
• 
  B
• 
  C
• 
  D

• Associative property of addition A
• Commutative property of addition B
• Distributive property C
• Additive identity 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

∀a,b,c∈R and c>0,then

• a>b ⇒ ac < bc A
• a>b ⇒ ac > bc B
• a<b ⇒ ac > bc C
• None of these D

Which of the following sets has closure property w.r.t. addition

• { 0 } A
• { 1 } B
• { 0, -1} C
• { 1, -1} D

(a-1)-1 =

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

• x A
• 
  B
• y C
• 
  D

i =

• 
  A
• 
  B
• 
  C
• 
  D

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

The square roots of negative numbers is called

• Real no A
• Complex no B
• Positive no C
• Negative no D

• 
  A
• 
  B
• 
  C
• 
  D

• -3 -2i A
• 3 +2i B
• 1 + 2i C
• 1 - 2i D

In (x +iy) y is called as

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

Additive inverse of - a - b is

• a A
• -a + b B
• a - b C
• a + b D

Geometrically, the modulus of a complex number represents its distance from the

• Point (1, 0) A
• Point (0, 1) B
• Point (1, 1) C
• Point (0, 0) D

• Associative law of addition A
• Commutative law of addition B
• Additive identity C
• Closure law of addition D

• A natural number A
• A rational number B
• An irrational number C
• A whole number 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

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

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

• Trichotomy property A
• Additive property of inequality B
• Transitive property C
• Multiplicative property D

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

(7, 9) + (3, -5) =

• (4, 4) A
• (10, 4) B
• (9, -5) C
• (7, 3) D

• 
  A
• 
  B
• 
  C
• 
  D

The multiplicative inverse of 1 is

• 1 A
• -1 B
• 0 C
• Does not exist D

Name the property used in 4.1 + (-4.1) = 0

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

∀a,b, c ε R,a +c = b + c = > a = b

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