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

• A prime number A
• An integer B
• A whole number C
• An irrational number D

A prime number can be a factor of a square only if it occurs in the square at least

• Once A
• Thirce B
• Twice C
• None of these D

√25 is a number

• Rational A
• Irrational B
• Natural C
• Odd D

In (x + iy), y is called as

• Imaginary part A
• Complex number B
• Real part C
• None of above D

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

1/3 is a decimal

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

∀x,y∈R and x> 0 , y>0, if x > y

• 
  A
• 
  B
• 
  C
• None of these D

• x A
• 
  B
• y C
• 
  D

The multiplicative inverse of 1 is

• 1 A
• -1 B
• 0 C
• Does not exist D

Every real number is

• A complex number A
• A rational number B
• A natural number C
• A prime number D

i =

• 
  A
• 
  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^-1)^-1=

• a^-1 A
• a B
• -a C
• None of above D

The equation |x + 4| = x has solution

• x = -2 A
• x = 2 B
• x = -4 C
• x = 4 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

• Associate 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

Q∪ Q' =

• Q A
• Q' B
• N C
• R D

The square root of 2i - 20i is

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

I is not

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

The multiplicative inverse of 4 is

• -4 A
• -1/4 B
• 1/4 C
• 1 D

• Closure law of addition A
• Associative law of addition B
• Commutative law of multiplication C
• Associative law of multiplication D

The order axioms are satisfied by set of

• C A
• C and R B
• R C
• None of these D

• Principle of equality of fractions A
• Rule for product of fraction B
• Rule for quotient of fraction C

• 15 A
• 15 i B
• -15 i C
• -15 D

∀ z ∈ C, multipliucative is

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

If a set S contains n elements then P (S) has ........ number of elements

• 2ⁿ A
• 2ⁿ² B
• 2.n C
• n² D

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

√11 is

• an irrational number A
• Rational number B
• odd number C
• Negative number D

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

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