ECAT Pre Engineering MCQ Test With Answer for Chapter 1 Mathematics

3/4 is ______

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

√23 is

• A rational number A
• A irrational number B
• An even integer C
• A factor of 36 D

2.333....is a

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

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

• Set of whole number A
• Rational Numbers B
• Complex numbers C
• Whole numbers D

√25 is a number

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

It is not possible to find the exact value of

• π A
• √9 B
• ∛27 C
• √1 D

If ∀a,b ε R,then a +b  ε  R is a property

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

The decimal fraction in which we have finite number of digits in its decimal part is called.

• recurring decimal fraction A
• Non terminating faction B
• Non recurring fraction C
• terminating decimal fraction D

• 
  A
• 
  B
• 
  C
• 
  D

The set of natural no. is closed under

• multiplication A
• subtraction B
• difference C
• division 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

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

• 
  A
• 
  B
• 
  C
• 
  D

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

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

A subset of set of complex number whose elements are of the form (a,0) is called

• Real number A
• Complex number B
• Rational number C
• Irrational number D

(a +bi) -c (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

In set builder notation the set {0,1,2,........100} can be written as

• {x / xε B ∧ x ≤ 100} A
• {x / x ∈ W ∧ x < 101} B
• {x / x ∈ Z ∧ x < 101} C
• The set of first 100 whole numbers D

i³=

• -1 A
• i B
• -i C
• 1 D

• Reflexive property A
• Symmetric property B
• Transitive property C
• Additive property D

In R the right cancellation property w.r.t. addition is

• 
  A
• 
  B
• 
  C
• 
  D

The square root of 2i - 20i is

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

The multiplicative inverse of 1 is

• 1 A
• -1 B
• 0 C
• Does not exist D

Multiplicative inverse of 0 is

• 0 A
• 1 B
• ±1 C
• Does not exist D

A non-terminating non_recurring decimal represents an

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

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

i¹⁰¹=

• i A
• i² B
• -i C
• -1 D

• 1 A
• 3 B
• 2-i C
• -1 D

i² =

• 1 A
• 2 B
• -1 C
• 0 D