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

202.04 is an example of

• Recurring decimals A
• Non-recurring decimals B
• Terminating decimals C
• None of above D

• 
  A
• 1 B
• 
  C
• -1 D

Every natural number is

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

• 
  A
• 
  B
• 
  C
• 
  D

24 can be written as a product of

• Odd factors A
• Even factors B
• Whole factors C
• Prime factors D

The symbol of irrational is

• W A
• N B
• Q C
• Q' D

If z₁ = (a,b), z₂=(c,d), then z₁ z₂ = -------------------

• (ac,bd) A
• (ac+bd, ad-bc) B
• (ac-bd , ad+bc) C
• (ac-bd , ad-bc) D

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

• a,a = a² A
• a,a = 1 B
• a,a = 0 C
• None of these D

It is not possible to find the exact value of

• π A
• √9 B
• ∛27 C
• √1 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 set {0,-1} hold closure property under

• Addition A
• Both a & c B
• Multiplication C
• None of these D

• 
  A
• 
  B
• 
  C
• 
  D

(a-1)-1 =

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

0.25 is ______

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

The decimal fraction in which we have finite number of digits in its decimal part is called.

• recurring decimal fraction A
• Non terminating faction B
• Non recurring fraction C
• terminating decimal fraction D

• Associate law of addition A
• Commutative law of addition B
• Additive identity C
• Closure law of addition 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

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

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

Any recurring decimal represents a

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

O is ______

• A positive integer A
• A negative integer B
• A natural number C
• An integer D

In polar form of complex number r =

• 
  A
• 
  B
• 
  C
• 
  D

3/2 is

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

(a^-1)^-1=

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

• 
  A
• 
  B
• 
  C
• 
  D

√11 is

• an irrational number A
• Rational number B
• odd number C
• Negative number D

What is the conjugate of -6 -i?

• -6 +i A
• 6+i B
• -6 -i C
• 6 -i 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

π is ______

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

0 (zero) is

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