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

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

• 
  A
• 
  B
• 
  C
• 
  D

• 
  A
• 1 B
• 
  C
• -1 D

Gooch crucible is made of :

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

i =

• √1 A
• √2 B
• √-2 C
• √-1 D

A subset of set of complex number whose elements are of the form (a,0) is called

• Real number A
• Complex number B
• Rational number C
• Irrational number D

√23 is

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

Every recurring decimal represents

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

It is not possible to find the exact value of

• π A
• √9 B
• ∛27 C
• √1 D

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

The set {0,-1} hold closure property under

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

Zero is

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

• 
  A
• 
  B
• 
  C
• 
  D

• 
  A
• 
  B
• 
  C
• 
  D

The value of i⁴ⁿ⁺¹

• 1 A
• -1 B
• i C
• i² D

• 
  A
• 
  B
• 
  C
• None of these D

If 0 = R, thenthe additive inverse of a is

• 1/9 A
• ^1/-9 B
• a C
• -a D

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

If A = {x / x ∈ R ∧ x² - 16 = 0} then A =

• - x A
• Infinite set B
• Φ C
• {-4,4} D

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

√-1 b=

• b A
• 2 B
• 2b C
• None of these D

√25 is a number

• Rational A
• Irrational B
• Natural C
• Odd 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

• 
  A
• 
  B
• 
  C
• 
  D

• 
  A
• 
  B
• 
  C
• 
  D

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

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

• Additive property A
• Transitive property B
• Trichotomy property of inequality C

(a +bi) -c (c +di) =

• (a +b) = (c +d) A
• (a +c) + i(b +d) B
• (a -c) + (c -d)i C
• (a -c) +(b -d) i D

O is ______

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

(a+bi) - (c+di)=

• (a+b) = (c+d) A
• (a+c) + i(b+d) B
• (a - c) + (c- d)i C
• (a - c)+ (b - d)i D