ECAT Pre Engineering MCQ Test With Answer for Chapter 1 Mathematics

• x A
• 
  B
• y 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

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

Every real number is

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

If 4 > b or a < b than a = b is a

• Additive property A
• Transitive property B
• Trichotomy property of inequality C
• None of above D

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

• Additive inverse A
• Multiplication inverse B
• Additive identity C
• Multiplication identity 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 = -i C
• x = 2, y = 2 D

The value of i⁴ⁿ⁺¹

• 1 A
• -1 B
• i C
• i² D

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

In R, the multiplicative identity is

• 0 A
• 1 B
• -1 C
• None D

What is the conjugate of -7 -2i ?

• -7 + 2i A
• 7 +2i B
• 7 -2i C
• √53 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

2.333....is a

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

The multiplicative inverse of (a,b) is

• 
  A
• 
  B
• 
  C
• 
  D

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

• 
  A
• 
  B
• 
  C
• 
  D

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

i is equal

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

• 
  A
• 
  B
• 
  C
• 
  D

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

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

• 
  A
• 
  B
• 
  C
• 
  D

i³=

• -1 A
• i B
• -i C
• 1 D

6 is

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

• N A
• r B
• 2r C
• π D

1.4142135... is ______

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

• 0 A
• 1 B
• -1 C
• 2 D

• Additive property of inequality A
• Commutative property B
• Additive inverse C
• Additive identity D

For any real numbers x,y,xy=o ⇒

• x ≠ 0 ∧ y ≠ 0 A
• x = 0 ∨ y = 0 B
• x = 0 C
• y = 0 D

i² = 

• 1 A
• 2 B
• -1 C
• 0 D

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

• One A
• Two B
• Three C
• Four D