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

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

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

• 
  A
• 
  B
• 
  C
• 
  D

(7, 9) + (3, -5) =

• (4, 4) A
• (10, 4) B
• (9, -5) C
• (7, 3) D

• 
  A
• 
  B
• 
  C
• 
  D

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

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

If z=(x,y) then z has no multiplicative inverse when

• x ≠ 0, y = 0 A
• x = 0, y = 0 B
• x = 0, y ≠ 0 C
• None of these D

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

π is ______

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

The multiplicative inverse of 4 is

• -4 A
• -1/4 B
• 1/4 C
• 1 D

Any recurring decimal represents a

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

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

The additive inverse of 1 is

• 1 A
• -1 B
• 0 C
• Does not exist D

The identity element with respect to subtraction is

• 0 A
• 1 B
• -1 C
• Does not exist D

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

• additive property A
• multiplicative property B
• additive inverse C
• additive identity D

• Additive property in R A
• Multiplication property in R B
• Cancellation property in R C
• Distribution property in R D

Q∪ Q' =

• Q A
• Q' B
• N C
• R 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

If z₁ =√-36 ,z₂ =√-25,z3 =√-16 then

• 15 A
• 15i B
• -15i C
• -15 D

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

• One A
• Two B
• Three C
• Four D

i³ =

• -1 A
• i B
• -i C
• 1 D

Which of the following has the same value as i¹¹³?

• i A
• -1 B
• -i C
• 1 D

• 0 A
• 1 B
• -1 C
• 2 D

In R, the multiplicative identity is

• 0 A
• 1 B
• -1 C
• None 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

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

The equation |x + 4| = x has solution

• x = -2 A
• x = 2 B
• x = -4 C
• x = 4 D

The real number system contains.

• Positive Numbers A
• Negative numbers B
• Zero C
• (option a, b and c) D

O is ______

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