ECAT Pre Engineering MCQ Test With Answer for Chapter 1 Mathematics

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

14 is not a

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

• 
  A
• 
  B
• 
  C
• 
  D

The square root of 2i - 20i is

• +-(5 - 2i) A
• +-(5 + 2i) B
• (5 - 2i) C
• None of these D

Name the property used in a (b-c) = ab - ac

• commutative property of multiplication A
• distributive property of multiplication B
• associative property of multiplication C
• multiplicative inverse D

• 
  A
• 
  B
• 
  C
• 
  D

3/4 is ______

• An odd number A
• An even number B
• A natural number C
• A rational number D

• 
  A
• 1 B
• 
  C
• -1 D

i² =

• 1 A
• 2 B
• -1 C
• 0 D

• 1 A
• 3 B
• 2-i C
• -1 D

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

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

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

i³=

• -1 A
• i B
• -i C
• 1 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

i¹⁰¹=

• i A
• i² B
• -i C
• -1 D

i⁹ =

• i² A
• -1 B
• 1 C
• i D

Any recurring decimal represents a

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

• 
  A
• 
  B
• 
  C
• 
  D

The symbol of irrational is

• W A
• N B
• Q C
• Q' 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

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

∀ z ∈ C, multipliucative is

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

In R, the additive identity is

• 0 A
• 1 B
• -1 C
• None D

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

Any whole number can be written as a product of factors which are

• Odd numbers A
• Prime number B
• Rational number C
• Even number D

Rational number is a number which can be written as a terminating decimal fraction or a

• Non-terminating decimal fraction A
• Non-recurring B
• Recurring decimal fraction C
• a, b and c D

The negative square root of 9 can be written as:

• -√9 A
• √9 B
• √18 C
• -√18 D

2.333....is a

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

202.04 is an example of

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

Multiplicative inverse of "1" is

• 0 A
• ±1 B
• 1 C
• {0,1} D