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

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

In R, the multiplicative identity is

• 0 A
• 1 B
• -1 C
• None D

The additive inverse of 2/3 is

• 3/2 A
• -2/3 B
• -3/2 C
• 0 D

1/3 is a decimal

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

• N A
• r B
• 2r C
• π D

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

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

The identity element with respect to subtraction is

• 0 A
• -1 B
• 0 and 1 C
• None of thes D

Name the property used in 1000 x 1 = 1000

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

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

• 
  A
• 
  B
• 
  C
• 
  D

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

24 can be written as a product of

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

Every real number is

• a positive integer A
• a rational number B
• a negative integer C
• a complex number D

• 
  A
• 
  B
• 
  C
• 
  D

What is the conjugate of -6 -i?

• -6 +i A
• 6+i B
• -6 -i C
• 6 -i D

The solution set of the equation |3x + 2| = 5 is

• 
  A
• 
  B
• 
  C
• 
  D

QUQ'

• 
  A
• 
  B
• 
  C
• 
  D

• 1 A
• -1 B
• 
  C
• 
  D

Associative law of multiplication

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

• 
  A
• 
  B
• 
  C
• 
  D

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

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

• 
  A
• 
  B
• 
  C

If in a set of real no a is multiplicative identity then

• a,a = a² A
• a,a = 1 B
• a,a = 0 C
• None of these D

i⁹ =

• i² A
• -1 B
• 1 C
• i D

0 (zero) is

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

In R, the multiplicative inverse of a is

• 0 A
• 1 B
• -a C
• 1/a D

∀x,y∈ R and x < 0, y < 0, which one is true 

• xy < o A
• xy = o B
• xy > o C
• None of these D

The multiplicative inverse of 2/3 is

• 3/2 A
• -2/3 B
• -3/2 C
• 1 D