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
• 
  B
• 
  C
• 
  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

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

The set of rationals numbers between 0 and I is

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

3/2 is

• An irrational number A
• Whole number B
• A positive integer C
• A rational number D

Additive inverse of - a - b is

• a A
• -a + b B
• a - b C
• a + b D

• 
  A
• 
  B
• 
  C
• 
  D

The set of rational number is represented by

• W A
• R B
• Q' C
• Q
  
  
  D

The negative square root of 9 can be written as:

• -√9 A
• √9 B
• √18 C
• -√18 D

• 
  A
• 
  B
• 
  C
• 
  D

Total number of subsets that can be formed out of the set {a,b,c} is

• 1 A
• 4 B
• 8 C
• 12 D

3.5+5.4=5.4+3.5 =8.9 this property of addition is called

• additive identity A
• assoclative property B
• commulative property C
• closure property D

The solution set of the equation |3x + 2| = 5 is

• 
  A
• 
  B
• 
  C
• 
  D

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

• 
  A
• 
  B
• 
  C
• 
  D

• 
  A
• 
  B
• 
  C
• 
  D

In R the number of identity element w.r.t '+' is

• One A
• Two B
• Three C
• Four D

In (x + iy), y is called as

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

It is not possible to find the exact value of

• π A
• √9 B
• ∛27 C
• √1 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

a >b, b >c ⇒a >c is a

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

If z = (x,y) , then  z ̅  =

• (-x,y) A
• (x,-y) B
• (-x, -y) C
• None of these D

The multiplicative inverse of 0 is

• 1 A
• -1 B
• 0 C
• Does not exist D

In R, the multiplicative inverse of a is

• 0 A
• 1 B
• -a C
• 1/a D

Every natural number is

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

If Z = (1,2), then Z^-1 =?

• (0.2, 0.4) A
• (-0.2 ,0.4) B
• (0.2,-0.4) C
• (-0.2,-0.4) D

Every real number is

• a positive integer A
• a rational number B
• a negative integer C
• a complex number D

(a^-1)^-1=

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

1.4142135... is ______

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