ECAT Pre Engineering MCQ Test With Answer for Chapter 1 Mathematics

4/√49 is a

• Irrational Number A
• Prime Number B
• Rational number C
• Whole number D

The product of complex numbers (a,b) and (c,d) is

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

a >b, b >c ⇒a >c is a

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

• N A
• r B
• 2r C
• π D

What is the conjugate of -6 -i?

• -6 +i A
• 6+i B
• -6 -i C
• 6 -i D

i¹⁰¹ =

• i A
• i² B
• -i C
• -1 D

0 (zero) is

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

There is no element common in

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

If a set S contains n elements then P (S) has ........ number of elements

• 2ⁿ A
• 2ⁿ² B
• 2.n C
• n² 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

• 
  A
• 
  B
• 
  C
• 
  D

• Rule of quotient of fraction A
• Golden rule of fraction B
• Rule for product of fraction C
• Principle for equality of fraction D

• 
  A
• 
  B
• 
  C
• 
  D

The multiplicative inverse of 1 - 2i is

• 
  A
• 
  B
• 
  C
• 
  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

Name the property used in a (b-c) = ab - ac

• commutative property of multiplication A
• distributive property of multiplication B
• associative property of multiplication C
• multiplicative inverse D

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

• 
  A
• 
  B
• 
  C
• 
  D

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

The square root of 2i - 20i is

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

Which of the following has the same value as i¹¹³?

• i A
• -1 B
• -i C
• 1 D

• 
  A
• 
  B
• 
  C
• 
  D

∀a,b ε R, ab = be is a

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

√2 is a number

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

The symbol of irrational is

• W A
• N B
• Q C
• Q' 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

I is not

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

• 15 A
• 15 i B
• -15 i C
• -15 D

In R, the additive inverse of a is

• 0 A
• 1 B
• -a C
• 1/a D

6 is

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