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

√11 is

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

6 is

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

In (x +iy) y is called as

• Imaginary part A
• Complex number B
• Real part C
• None of above D

(a,0) x (c, 0) =

• (0,ac) A
• (ac, 0) B
• (0,0) C
• (a, c) D

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

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

Which of the following sets has closure property w.r.t. addition

• { 0 } A
• { 1 } B
• { 0, -1} C
• { 1, -1} D

(a-1)-1 =

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

In R the number of identity elements w.r.t.'.' is

• One A
• Two B
• Three C
• Four D

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

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

Decimal part of irrational number is

• Terminating A
• Repeating only B
• Neither repeating nor terminating C
• Repeating and terminating D

i =

• √1 A
• √2 B
• √-2 C
• √-1 D

Total number of subsets that can be formed out of the set {a,b,c} is

• 1 A
• 4 B
• 8 C
• 12 D

√x = ______ if is a prime number

• Rational no A
• Natural no B
• Irrational no C
• Complex no D

√-1 b=

• b A
• 2 B
• 2b C
• None of these D

In R the number of identity element w.r.t '+' is

• One A
• Two B
• Three C
• Four D

Every prime number is also

• Rational number A
• Even number B
• Irrational number C
• Multiple of two numbers D

• Symmetric property A
• Cancellation property w.r.t. multiplication B
• Reflexive property C
• Transitive property D

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

If z₁ = 1 + 2i, z₂ = 3 + 4i then

• z₁ > z₂ A
• z₁ = z₂ B
• z₁ < z₂ C
• None of these D

A non-terminating, non-recurring decimal represent

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

There is no element common in

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

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

In set builder notation the set {0,1,2,........100} can be written as

• {x / xε B ∧ x ≤ 100} A
• {x / x ∈ W ∧ x < 101} B
• {x / x ∈ Z ∧ x < 101} C
• The set of first 100 whole numbers D

• 
  A
• 
  B
• 
  C
• 
  D

• 
  A
• 
  B
• 
  C
• 
  D

The order axioms are satisfied by set of

• C A
• C and R B
• R C
• None of these D

• 15 A
• 15 i B
• -15 i C
• -15 D

i =

• 
  A
• 
  B
• 
  C
• 
  D