ECAT Pre Engineering MCQ Test With Answer for Chapter 1 Mathematics

Which of the following has the same value as i¹¹³?

• i A
• -1 B
• -i C
• 1 D

The identity element with respect to subtraction is

• 0 A
• 1 B
• -1 C
• Does not exist D

The√ is used for the

• Positive square root A
• Negative square root B
• +ve and -ve square root C
• Whole number D

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

• additive property A
• multiplicative property B
• additive identity C
• multiplicative identity D

Zero is

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

What is the conjugate of -6 -i?

• -6 +i A
• 6+i B
• -6 -i C
• 6 -i D

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

In R the left cancellation property w.r.t addition is

• 
  A
• 
  B
• 
  C
• 
  D

Every real number is

• A complex number A
• A rational number B
• A natural number C
• A prime number D

i^-(4n+2) = -------------------------------

• 1 A
• i B
• -1 C
• -i D

The set of rational number is represented by

• W A
• R B
• Q' C
• Q
  
  
  D

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

• Associative property of addition A
• Associative property of multiplication B
• Commutative property of addition C
• Commutative property of multiplication 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

√23 is

• A rational number A
• A irrational number B
• An even integer C
• A factor of 36 D

∀a,b ε R, ab = be is a

• Commutative law of multiplication A
• Closure law of multiplication B
• Associative law of multiplication C
• Multiplicative identity D

• (x, y) A
• (kx, y) B
• (x, ky) C
• (kx, ky) D

• 
  A
• 
  B
• 
  C
• 
  D

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

The equation |x +4| = x has solution

• x = -2 A
• x = 2 B
• x = -4 C
• x = 4 D

14 is not a

• Prime number A
• Whole number B
• Even number C
• Real 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

I is not

• Real number A
• Natural number B
• Prime Number C
• Whole Number 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

The multiplicative inverse of 1 - 2i is

• 
  A
• 
  B
• 
  C
• 
  D

0 (zero) is

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

QUQ, =

• N A
• R B
• W C
• Z D

(a,0) x (c, 0) =

• (0,ac) A
• (ac, 0) B
• (0,0) C
• (a, c) D

• 
  A
• 
  B
• 
  C
• 
  D