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

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

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

• 
  A
• 
  B
• 
  C
• 
  D

∀a,b, c ε R ac = bc ⇒ a = b, c ≠ 0 is a

• Symmetric property A
• Cancellation property w.r.t multiplication B
• Reflexive property C
• Transitive property D

It is not possible to find the exact value of

• π A
• √9 B
• ∛27 C
• √1 D

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

if Z1 = 1+i, Z2= 2+3i, then |Z2 -Z1| =

• √3 i A
• √7 B
• -2-i C
• √5 D

A non-terminating, non-recurring decimal represent

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

π is ______

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

The multiplicative inverse of 0 is

• 1 A
• -1 B
• 0 C
• Does not exist D

Gooch crucible is made of :

• Brass. A
• Porcelain. B
• Bronze. C
• Gold. D

24 can be written as a product of

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

The additive inverse of 1 is

• 1 A
• -1 B
• 0 C
• Does not exist D

(a,b) +(-a,-b) =

• (0,0) A
• (a,b) B
• (-a,-b) C
• (1,1) D

∀x,y∈R and x> 0 , y>0, if x > y

• 
  A
• 
  B
• 
  C
• None of these D

The multiplicative inverse ofx^(-1) is

• x A
• a-2 B
• 0 C
• 1 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

∀x, y ∈ R, either x = y or x > y or x < y is

• Transitive property A
• Reflexive property B
• Trichotomy property C
• None of these D

What is the conjugate of -6 -i?

• -6 +i A
• 6+i B
• -6 -i C
• 6 -i D

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

• One A
• Two B
• Three C
• Four D

The set of rational number is represented by

• W A
• R B
• Q' C
• Q
  
  
  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

• 
  A
• 
  B
• 
  C
• 
  D
• 
  E

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

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

• 
  A
• 
  B
• 
  C
• 
  D

If a and b are real numbers then a+b is also real number this law is called

• associative law of addition A
• closure law of addition B
• Distributive law of addition C
• Commutative law of addition D

Multiplicative inverse of 0 is

• 0 A
• 1 B
• ±1 C
• Does not exist 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

• real number A
• complex number B
• rational number C
• irrational number D