ECAT Pre Engineering MCQ Test With Answer for Chapter 1 Mathematics

A non-terminating non_recurring decimal represents an

• Irrational no A
• Both a & c B
• Rational no C
• None of these D

• real number A
• complex number B
• rational number C
• irrational number D

What is the conjugate of -6 -i

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

• 
  A
• 
  B
• 
  C
• 
  D
• 
  E

I is not

• Real number A
• Natural number B
• Prime Number C
• Whole Number D

i⁹ =

• i² A
• -1 B
• 1 C
• i D

QUQ'

• 
  A
• 
  B
• 
  C
• 
  D

If z = (x,y) , then  z ̅  =

• (-x,y) A
• (x,-y) B
• (-x, -y) C
• None of these D

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

Total number of subsets that can be formed out of the set {a,b,c} is

• 1 A
• 4 B
• 8 C
• 12 D

The value of i⁴ⁿ⁺¹

• 1 A
• -1 B
• i C
• i² D

O is ______

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

• 
  A
• 
  B
• 
  C
• 
  D

Every recurring decimal represents

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

π is ______

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

In R, the multiplicative identity is

• 0 A
• 1 B
• -1 C
• None D

• 1 A
• -i B
• i C
• 0 D

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

In R, the multiplicative inverse of a is

• 0 A
• 1 B
• -a C
• 1/a D

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

0 (zero) is

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

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

The value of x, and y, when (x + iy)²= 5 + 4i

• X = 2, y = 1 A
• X = -2, y = 1 B
• X = 2, y = -1 C
• X = 2, y = 2 D

(7,9) +(3,-5) =

• (4,4) A
• (10,4) B
• (9,-5) C
• (7,3) D

• 
  A
• 
  B
• 
  C
• None of these D

The negative square root of 9 can be written as:

• -√9 A
• √9 B
• √18 C
• -√18 D

∀x,y∈R and x> 0 , y>0, if x > y

• 
  A
• 
  B
• 
  C
• None of these D

• 
  A
• 
  B
• 
  C
• 
  D