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

Name the property used in 4.1 + (-4.1) = 0

• Additive inverse A
• Multiplication inverse B
• Additive identity C
• Multiplication identity D

• 
  A
• 
  B
• 
  C
• 
  D

If A = {x / x ∈ R ∧ x² - 16 = 0} then A =

• - x A
• Infinite set B
• Φ C
• {-4,4} D

Q∪ Q' =

• Q A
• Q' B
• N C
• R D

The set of rational number is represented by

• W A
• R B
• Q' C
• Q
  
  
  D

Every prime number is also

• Rational number A
• Even number B
• Irrational number C
• Multiple of two numbers D

• Multiplication property A
• Additive property B
• Trichotomy property C
• Transitive property of inequality D

π is ______

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

The multiplicative inverse of 0 is

• 1 A
• -1 B
• 0 C
• Does not exist D

0 (zero) is

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

• Symmetric property A
• Cancellation property w.r.t. multiplication B
• Reflexive property C
• Transitive property 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

The identity element with respect to subtraction is

• 0 A
• 1 B
• -1 C
• Does not exist D

The square root of 2i - 20i is

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

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

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

The set of rationals numbers between 0 and I is

• Finite A
• Null set B
• Infinite C
• None of these D

• 
  A
• 
  B
• 
  C
• 
  D

The additive identity of real number is

• 1 A
• 2 B
• 1/2 C
• 0 D

• 
  A
• 
  B
• 
  C
• 
  D

A non-terminating non_recurring decimal represents an

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

∀ z ∈ C, multipliucative is

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

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

i⁹ =

• i² A
• -1 B
• 1 C
• i D

• 
  
  
  A
• 
  B
• 
  C
• 
  D

Multiplicative inverse of "1" is

• 0 A
• ±1 B
• 1 C
• {0,1} D

Additive inverse of - a - b is

• a A
• -a + b B
• a - b C
• a + b D

• are real no A
• both are not real B
• are imaginary no C
• both are imaginary D

Which of the following has the same value as i¹¹³?

• i A
• -1 B
• -i C
• 1 D

In R the number of identity elements w.r.t.'.' is

• One A
• Two B
• Three C
• Four 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