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

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

• 1 A
• 4 B
• 8 C
• 12 D

Name the property used in 1000 x 1 = 1000

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

• 
  A
• 
  B
• 
  C
• 
  D

√25 is a number

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

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

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

In R, the multiplicative identity is

• 0 A
• 1 B
• -1 C
• None D

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

• One A
• Two B
• Three C
• Four D

The additive inverse of 2/3 is

• 3/2 A
• -2/3 B
• -3/2 C
• 0 D

• 
  A
• 
  B
• 
  C
• 
  D

The value of x, and y, when (x + iy)²= 5 + 4i

• X = 2, y = 1 A
• X = -2, y = 1 B
• X = 2, y = -1 C
• X = 2, y = 2 D

Some of two real numbers is also a real number , this property is called:

• Commutative property w.r.t addition A
• Closure property w.r.t. addition B
• Associative property w.r.t. addition C
• Distributive property w.r.t addition D

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

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

202.04 is an example of

• Recurring decimals A
• Non-recurring decimals B
• Terminating decimals C
• None of above D

√x = ______ if is a prime number

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

a >b ⇒a +c >b +c is known as

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

The real number system contains.

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

6 is

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

1/3 is a decimal

• Recurring A
• Terminating B
• Non-terminating C
• None of the above D

i =

• √1 A
• √2 B
• √-2 C
• √-1 D

Which of the following has the same value as i¹¹³?

• i A
• -1 B
• -i C
• 1 D

• 
  A
• 
  B
• 
  C
• 
  D

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

1.4142135... is ______

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

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

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

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

14 is not a

• Prime number A
• Whole number B
• Even number C
• Real number D

3.5+5.4=5.4+3.5 =8.9 this property of addition is called

• additive identity A
• assoclative property B
• commulative property C
• closure property D

√2 +√3 +√5) = (√2 +√3 +√5: this property is called

• associative property w.r.t addition A
• commutative property B
• Closure property w.r.t addition C
• Additive identity D