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

6 is

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

• 
  A
• 
  B
• 
  C
• 
  D

• (a + b)c = a . c + bc A
• a + b = b + a B
• (a + b) + c = a + (b + c) C
• a(b+ c) = ab + ac D

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

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

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

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

What is the conjugate of -6 -i

• -6 +i A
• 6 + i B
• -6 -i C
• 6 -i D

The set of rationals numbers between 0 and I is

• Finite A
• Null set B
• Infinite C
• None of these D

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

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

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

√-1 b=

• b A
• 2 B
• 2b C
• None of these D

Every irrational number is

• A real number A
• A prime number B
• A natural number C
• An integer D

Q∪ Q' =

• Q A
• Q' B
• N C
• R 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

∀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

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

What is the conjugate of -7 -2i ?

• -7 + 2i A
• 7 +2i B
• 7 -2i C
• √53 D

• 
  A
• 
  B
• 
  C
• 
  D

i is equal

• (1 , 0) A
• (0 , 1) B
• (1 , 1) C
• (0 , 0) D

• 
  A
• 
  B
• 
  C
• 
  D

∀ z ∈ C, multipliucative is

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

i² =

• 1 A
• 2 B
• -1 C
• 0 D

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

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

√(-1b) =?

• b i A
• -i b B
• b2 C
• i√b D

(a+bi) - (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

If P is a whole number greater than 1, which has only P and I are factors. Then P is called

• Wholw number A
• Prime number B
• Even number C
• Odd number D

i^-(4n+2) = -------------------------------

• 1 A
• i B
• -1 C
• -i D

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

∀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