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

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

The square root of 2i - 20i is

• +-(5 - 2i) A
• +-(5 + 2i) B
• (5 - 2i) C
• None of these D

• 
  A
• 
  B
• 
  C
• 
  D

Associative law of multiplication

• ab - ba A
• a(bc) = (ab) c B
• a(b + c) = ab +ac C
• (a +b)c = ac + bc D

√25 is a number

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

24 can be written as a product of

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

(a-1)-1 =

• a-1 A
• a B
• -a C
• None of above D

I is not

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

In R, the additive identity is

• 0 A
• 1 B
• -1 C
• None D

Which of the following has the same value as i¹¹³?

• i A
• -1 B
• -i C
• 1 D

∀x,y,z ∈ R and z 0,then

• x > y ⇒ xz > yz A
• x<y ⇒ xz < yz B
• x < y ⇒ xz > yz C
• None of these D

• x A
• 
  B
• y C
• 
  D

The multiplicative inverse ofx^(-1) is

• x A
• a-2 B
• 0 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

There is no element common in

• N and W A
• E and W B
• N and O C
• Q and Q' D

∀x,y∈R and x> 0 , y>0, if x > y

• 
  A
• 
  B
• 
  C
• None of these D

The multiplicative inverse of 1 - 2i is

• 
  A
• 
  B
• 
  C
• 
  D

The decimal fraction in which we have finite number of digits in its decimal part is called.

• recurring decimal fraction A
• Non terminating faction B
• Non recurring fraction C
• terminating decimal fraction D

• 
  A
• 
  B
• 
  C
• 
  D

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

O is ______

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

In R, the multiplicative inverse of a is

• 0 A
• 1 B
• -a C
• 1/a D

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

• a = a A
• a < a B
• a > a C
• a²= a D

• (a + b)c = ac + bc A
• a + b = b + a B
• (a + b) + c = a + (b + c) C
• a(b +c) = ab + ac D

(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

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

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

3/2 is

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

The set of natural no. is closed under

• multiplication A
• subtraction B
• difference C
• division D

Union of the sets of rational and irrational numbers is called 6th set of

• Natural numbers A
• Real numbers B
• Whole numbers C
• Prime numbers D