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

The square roots of negative numbers is called

• Real no A
• Complex no B
• Positive no C
• Negative no D

i =

• √1 A
• √2 B
• √-2 C
• √-1 D

The value of i⁴ⁿ⁺¹

• 1 A
• -1 B
• i C
• i² D

There is no element common in

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

• 0 A
• 1 B
• -1 C
• 2 D

What is the conjugate of -7 -2i?

• -7 + 2i A
• 7 + 2i B
• 7 -2i C
• None of these D

It is not possible to find the exact value of

• π A
• √9 B
• ∛27 C
• √1 D

i is equal

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

Any recurring decimal represents a

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

The multiplicative inverse of -3i is

• 3i A
• -3i B
• -1/3i C
• 1/3 i D

• Principle of equality of fractions A
• Rule for product of fraction B
• Rule for quotient of fraction C

If z₁ = (a,b), z₂=(c,d), then z₁ z₂ = -------------------

• (ac,bd) A
• (ac+bd, ad-bc) B
• (ac-bd , ad+bc) C
• (ac-bd , ad-bc) D

• Set of whole number A
• Rational Numbers B
• Complex numbers C
• Whole numbers D

• 
  A
• 
  B
• 
  C
• 
  D

• Commutative law of multiplication A
• Closure law of multiplication B
• Associative law of multiplication C
• Multiplication identity D

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

The symbol of irrational is

• W A
• N B
• Q C
• Q' D

√11 is

• an irrational number A
• Rational number B
• odd number C
• Negative number D

Zero is

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

• 
  A
• 1 B
• 
  C
• -1 D

• 
  A
• 
  B
• 
  C
• 
  D

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

Every real number is

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

• 
  A
• 
  B
• 
  C
• 
  D

i⁹ =

• i² A
• -1 B
• 1 C
• i 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

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

Rational number is a number which can be written as a terminating decimal fraction or a

• Non-terminating decimal fraction A
• Non-recurring B
• Recurring decimal fraction C
• a, b and c D

1/3 is ______

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