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

• 
  A
• 
  B
• 
  C
• 
  D

• 
  A
• 1 B
• 
  C
• -1 D

• -8 A
• 8 B
• 8i C
• 32 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

i⁹ =

• i² A
• -1 B
• 1 C
• 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

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
• 
  C
• 
  D

• 
  A
• 
  B
• 
  C
• 
  D

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

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

For each real number, there is a number which is its

• Negative A
• Possitive B
• Opposite C
• Similar D

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

• 
  A
• 
  B
• 
  C
• 
  D

2/9,5/7∈ R,(2│9)(5│7)=10/63∈R this property is called

• Associative property A
• Identity property B
• Commutative property C
• Closure property w.r.t multiplication D

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

• z is purely imaginary A
• a is any complex number B
• z is real C
• None of these D

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

(√3+√5)+√7 = √3 +(√5 +√7) property used in above is

• Commutative property of addition A
• Closure property of addition B
• Additive inverse C
• Associative property w.r.t to adition D

4/√49 is a

• Irrational Number A
• Prime Number B
• Rational number C
• Whole number 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

• Reflexive property A
• Symmetric property B
• Transitive property C
• Additive property D

2.333....is a

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

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

In R, the additive inverse of a is

• 0 A
• 1 B
• -a C
• 1/a D

In R, the additive identity is

• 0 A
• 1 B
• -1 C
• None D

There is no element common in

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

The multiplicative inverse of (a,b) is

• 
  A
• 
  B
• 
  C
• 
  D

The additive inverse of 2/3 is

• 3/2 A
• -2/3 B
• -3/2 C
• 0 D

Multiplicative inverse of "1" is

• 0 A
• ±1 B
• 1 C
• {0,1} D

The conjugate of √5 i is

• √5 A
• -√5 i B
• i C
• 5i D