More Classes
5th Class
6th Class
7th Class
8th Class
9th Class
10th Class
11th Class
12th Class
NAT I
NAT II
CSS
IQ
General Knowledge
MDCAT
ECAT
GAT General
GAT Subject
Other Links
Go to Home
Online Tests
ECAT Mathematics Chapter 1 Number System Online Test MCQs With Answers
Question # 1
Choose an answer
Previous
Skip
Next
Question # 2
i =
Choose an answer
Previous
Skip
Next
Question # 3
Choose an answer
Previous
Skip
Next
Question # 4
Name the property used in 100 + 0 = 100
Choose an answer
Additive inverse
Multiplicative inverse
Additive identity
Multiplicative identity
Previous
Skip
Next
Question # 5
π is ______
Choose an answer
A complex number
A rational number
A natural number
An irrational number
Previous
Skip
Next
Question # 6
Choose an answer
Previous
Skip
Next
Question # 7
2.333....is a
Choose an answer
Irrational no
Complex no
Rational no
None of these
Previous
Skip
Next
Question # 8
If P is a whole number greater than 1, which has only P and I are factors. Then P is called
Choose an answer
Wholw number
Prime number
Even number
Odd number
Previous
Skip
Next
Question # 9
i
101
=
Choose an answer
i
i
2
-i
-1
Previous
Skip
Next
Question # 10
Choose an answer
Associative law of addition
Commutative law of addition
Additive identity
Closure law of addition
Previous
Skip
Next
Question # 11
a.a
-1
= a
-1
.a = 1 is a
Choose an answer
Commutative law of multiplication
Multiplicative identity
Associative law of multiplication
Multiplicative inverse
Previous
Skip
Next
Question # 12
Union of the sets of rational and irrational numbers is called 6th set of
Choose an answer
Natural numbers
Real numbers
Whole numbers
Prime numbers
Previous
Skip
Next
Question # 13
∀a,b, c ε R ac = bc ⇒ a = b, c ≠ 0 is a
Choose an answer
Symmetric property
Cancellation property w.r.t multiplication
Reflexive property
Transitive property
Previous
Skip
Next
Question # 14
The multiplicative inverse of -3i is
Choose an answer
3i
-3i
-1/3i
1/3 i
Previous
Skip
Next
Question # 15
∀x,y,z ∈ R and z 0,then
Choose an answer
x > y ⇒ xz > yz
x<y ⇒ xz < yz
x < y ⇒ xz > yz
None of these
Previous
Skip
Next
Question # 16
If in a set of real no a is additive identity then
Choose an answer
a+a = 2a
a+a = 1
a+a = 0
None of these
Previous
Skip
Next
Question # 17
In R, the additive identity is
Choose an answer
0
1
-1
None
Previous
Skip
Next
Question # 18
In R the number of identity elements w.r.t.'.' is
Choose an answer
One
Two
Three
Four
Previous
Skip
Next
Question # 19
In polar form of complex number r =
Choose an answer
Previous
Skip
Next
Question # 20
If a and b are real numbers then a+b is also real number this law is called
Choose an answer
associative law of addition
closure law of addition
Distributive law of addition
Commutative law of addition
Previous
Skip
Next
Question # 21
Rational number is a number which can be written as a terminating decimal fraction or a
Choose an answer
Non-terminating decimal fraction
Non-recurring
Recurring decimal fraction
a, b and c
Previous
Skip
Next
Question # 22
Choose an answer
Previous
Skip
Next
Question # 23
The symbol of irrational is
Choose an answer
W
N
Q
Q'
Previous
Skip
Next
Question # 24
In R the number of identity element w.r.t '+' is
Choose an answer
One
Two
Three
Four
Previous
Skip
Next
Question # 25
i
3
=
Choose an answer
-1
i
-i
1
Previous
Skip
Next
Question # 26
The multiplicative inverse of 0 is
Choose an answer
1
-1
0
Does not exist
Previous
Skip
Next
Question # 27
The set { 1 , -1} is closed w.r.t.
Choose an answer
Addition
Multiplications
Subtraction
None of these
Previous
Skip
Next
Question # 28
The set of natural no. is closed under
Choose an answer
multiplication
subtraction
difference
division
Previous
Skip
Next
Question # 29
Choose an answer
real part of z
imaginary part of z
conjugate of z
modulus of z
Previous
Skip
Next
Question # 30
Choose an answer
Previous
Skip
Next
Question # 31
If
∀a,b ε R,then a +b ε R is a property
Choose an answer
Closure law of addition
Associative law of addition
Additive inverse
Additive identity
Previous
Skip
Next
Back