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

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

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
• 0 and 1 C
• None of thes D

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

• Reflexive property A
• Symmetric property B
• Transitive property C
• Additive property 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

• z is purely imaginary A
• a is any complex number B
• z is real C
• None of these D

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

The set of rational number is represented by

• W A
• R B
• Q' C
• Q
  
  
  D

A prime number can be a factor of a square only if it occurs in the square at least

• Once A
• Thirce B
• Twice C
• None of these D

0 (zero) is

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

The set of rationals numbers between 0 and I is

• Finite A
• Null set B
• Infinite C
• None of these D

The multiplicative inverse of (a,b) is

• 
  A
• 
  B
• 
  C
• 
  D

√2 is a number

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

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

24 can be written as a product of

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

• 1 A
• -i B
• i C
• 0 D

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

• √3 i A
• √7 B
• -2-i C
• √5 D

If a is any real number and a = a is called

• symmetric property A
• Trichotomy Properties B
• Transitive Property C
• Reflexive Properties D

O is ______

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

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

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

The√ is used for the

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

Every real number is

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

The value of i⁴ⁿ⁺¹

• 1 A
• -1 B
• i C
• i² D

Any recurring decimal represents a

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

• 
  A
• 
  B
• 
  C
• 
  D

i² =

• 1 A
• 2 B
• -1 C
• 0 D

If z₁= 2 + 6i and z₂= 3 + 7i, then which expression defines the product of z₁and z₂?

• 36 + (-32)i A
• -36 + 32i B
• 6 + (-11)1 C
• 0, +(-12)i D