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

24 can be written as a product of

• Odd factors A
• Even factors B
• Whole factors C
• Prime factors D

√23 is

• A rational number A
• A irrational number B
• An even integer C
• A factor of 36 D

The conjugate of √5 i is

• √5 A
• -√5 i B
• i C
• 5i D

1/3 is a decimal

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

The multiplicative inverse of 1 - 2i is

• 
  A
• 
  B
• 
  C
• 
  D

I is not

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

∀a,b,c∈R and c>0,then

• a>b ⇒ ac < bc A
• a>b ⇒ ac > bc B
• a<b ⇒ ac > bc C
• None of these D

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

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

∀ z ∈ C, multipliucative is

• (1,1) A
• (1,0) B
• (0,1) C
• None of these D

i =

• 
  A
• 
  B
• 
  C
• 
  D

• 1 A
• -1 B
• 
  C
• 
  D

In R, the multiplicative inverse of a is

• 0 A
• 1 B
• -a C
• 1/a D

• A rational number A
• A irrational number B
• An even integer C
• A factor of 36 D

3/2 is

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

6 is

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

0.25 is ______

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

If Z = (1,2), then Z^-1 =?

• (0.2, 0.4) A
• (-0.2 ,0.4) B
• (0.2,-0.4) C
• (-0.2,-0.4) D

i² =

• 1 A
• 2 B
• -1 C
• 0 D

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

202.04 is an example of

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

a.a^-1= a^-1.a = 1 is a

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

O is ______

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

Name the property used in 4 + 9 = 9 + 4

• Associative property of addition A
• Commutative property of addition B
• Distributive property C
• Additive identity 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
• 
  B
• 
  C
• 
  D

Name the property used in 4 x (5 x 8) = ( 4 x 5) x 8

• Associative property of addition A
• Associative property of multiplication B
• Additive identity C
• Multiplicative identity D

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

• 
  A
• 
  B
• 
  C
• 
  D