ECAT Pre Engineering MCQ Test With Answer for Chapter 1 Mathematics

Any recurring decimal represents a

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

Name the property used in 1000 x 1 = 1000

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

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

Name the property used in 100 + 0 = 100

• Additive inverse A
• Multiplicative inverse B
• Additive identity C
• Multiplicative identity D

i¹⁰¹ =

• i A
• i² B
• -i C
• -1 D

• Closure law of addition A
• Associative law of addition B
• Commutative law of multiplication C
• Associative law of multiplication D

i³=

• -1 A
• i B
• -i C
• 1 D

∀a,b,c∈R, a >b ∧ b>c ⇒ a >c is

• Trichotomy property A
• Transitive property B
• Symmetric property C
• Additive property D

√x = ______ if is a prime number

• Rational no A
• Natural no B
• Irrational no C
• Complex no 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

• N A
• r B
• 2r C
• π D

• 
  A
• 
  B
• 
  C
• 
  D

Such fraction which can not be written in the form ofp⁄q where p,q and q≠ 0,such fractions are called.

• Fractinal numbers A
• Rational Numbers B
• Even Numbers C
• Whole Numbers D

√2 is a number

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

0.25 is ______

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

• 
  A
• 
  B
• 
  C
• 
  D

1.4142135... is ______

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

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

• 
  A
• 
  B
• 
  C
• 
  D

• 0 A
• 1 B
• -1 C
• None of these D

The sum of complex number (a,b) and (c,d) is

• 
  A
• 
  B
• 
  C
• 
  D

1/3 is ______

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

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

• One A
• Two B
• Three C
• Four D

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

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

Every natural number is

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

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

The additive inverse of 0 is

• 1 A
• -1 B
• 0 C
• Does not exist D

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

• 1 A
• 3 B
• 2-i C
• -1 D