ECAT Pre Engineering MCQ Test With Answer for Chapter 1 Mathematics

Which of the following has the same value as i¹¹³?

• i A
• -1 B
• -i C
• 1 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

The multiplicative inverse ofx^(-1) is

• x A
• a-2 B
• 0 C
• 1 D

Zero is

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

The symbol of irrational is

• W A
• N B
• Q C
• Q' D

i¹⁰¹ =

• i A
• i² B
• -i C
• -1 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

• 1 A
• 3 B
• 2-i C
• -1 D

• 
  A
• 
  B
• 
  C
• 
  D

The multiplicative inverse of 1 - 2i is

• 
  A
• 
  B
• 
  C
• 
  D

0 (zero) is

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

• 
  A
• 
  B
• 
  C
• 
  D

i is equal

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

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

The identity element with respect to subtraction is

• 0 A
• 1 B
• -1 C
• Does not exist D

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

Name the property used in 1000 x 1 = 1000

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

• Associative property of addition A
• Associative property of multiplication B
• Commutative property of addition C
• Commutative property of multiplication D

• 
  A
• 1 B
• -1 C
• 
  D

• 0 A
• 1 B
• -1 C
• None of these 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

6 is

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

The additive inverse of 0 is

• 1 A
• -1 B
• 0 C
• Does not exist 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 + b)c = ac + bc A
• a + b = b + a B
• (a + b) + c = a + (b + c) C
• a(b +c) = ab + ac D

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

202.04 is an example of

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

• 
  A
• 1 B
• 
  C
• -1 D

The square root of 2i - 20i is

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