# Maths MCQS for NTS Set 3

#### Maths MCQS for NTS

The set of the first elements of the ordered pairs forming a relation is called its
1/x
0
does not exist
-x

If A and B are matrices such that AB=BA=I then
A and B are equal
A and B are multiplicative inverse of each other
A and B are singular matrices
A and B are additive inverses of each other

If ab > 0 and a < 0, which of the following is negative?
-a
-b
(a – b)2
b

If A and B are matrices of same order than (A + B)(A + B)=
None
subtraction
multiplication

The statement that a group can have more than one identity elements is
Fallacious
TRUE
FALSE
Some times true

The direction cosines of y-axis are
1,0,0
0,1,0
1,1,1
0,0,1

A fraction in which the degree of the numerator is less than the degree of the denominator is called
-1+i ?3 / 2
-1+i ?-3 / 2i
1+i ?3 / 2
1-i ?-3 / 2

A sequence of numbers whose reciprocals forms an arithmetic sequence is called
Harmonic sequence
Arithmetic series
Harmonic series
Geometric sequence

If k1 : k2 = 1:1 then the point P dividing the line is
Extreme left point
Plies out side k1 and k2
Extreme Right point
Mid point

Every prime number is also
even number
Irrational number
multiple of two numbers
Rational number