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Mathematics ECAT Pre Engineering Online Test MCQs With Answers
Question # 1
A∪(A∪B)= --------------------
Choose an answer
B
A
A∪B
None of these
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Question # 2
If Z
1
= 1 + i, Z
2
= 2+3i, then |Z
2
- Z
1
| = ?
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Question # 3
A monoid (G, *) is said to be group if
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have identity element
is commutative
have inverse of each element
None of these
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Question # 4
The points (5, 0, 2), (2, -6, 0), (4, -9, 6) and (7, -3, 8) are vertices of a
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Square
Rhombus
Rectangle
Parallelogram
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Question # 5
The multiplicative inverse of 1 is
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1
-1
0
Does not exist
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Question # 6
In an A.P,a +(n-a)d is
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1st term
General term
Last term
None of these
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Question # 7
If #n = (n-5)
2
+ 5, then find #3 x #4.
Choose an answer
54
12
4
9
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Question # 8
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Question # 9
If B ={x/x€ Z ^ - 3 < x < 6}, then n (B) =
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5
{-3,-2,-1,0,1,2,3,4,5,6}
8
9
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Question # 10
150°= ______
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Question # 11
Which of the following is a vector.
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distance
temperature
energy
acceleration
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Question # 12
Choose an answer
8
1/56
56
None of these
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Question # 13
A,G,H are in
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A.P
G.P
H.P
None of these
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Question # 14
For two vector a and b, a+b = _______
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a b
b+a
b-a
None
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Question # 15
Which of the following is a vector
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length
momentum
volume
speed
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Question # 16
Choose an answer
1
2
3
None of these
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Question # 17
Fifteen girls compete in a race. The first three places can be taken by them in
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3! ways
12! ways
15 x 14 x 13 ways
42 ways
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Question # 18
The geometrical representation of a linear function is
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Circle
Parabola
Straight lie
None of these
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Question # 19
pth term of an H.P. is qr and qth term is pr then the rth term of the H.P. is
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pqr
1
pq
pqr
2
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Question # 20
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Question # 21
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Question # 22
If A = {x/x is a positive integer and 4≤x<23}, then A=
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{1,2,3,4,5,6,7}
{4,5,6...........22}
{1,2,3,.........23}
{1,2,3,4,5}
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Question # 23
Choose an answer
One-one but not onto
One-one and onto
Onto but not one-one
Neither one-one nor onto
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Question # 24
In set builder notation the set {0, 1, 2, ............, 100} can be written as
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Question # 25
The condition for ax2 + bx c to be expressed as the product of linear polynomials is
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b4 - 4ac =0
b4- 4ac ≥0
b4- 4ac <0
b4= 4ac
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Question # 26
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Question # 27
The equation of a line parallel to the tangent to the circle x
2
+ y
2
= 16 at the point (2, 3) and passing thro' the origin is
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2x + 3y = 0
2x - 3y = 0
3x + 2y = 0
3x - 2y = 0
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Question # 28
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Question # 29
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2, 3
3, 3
2, 6
2, 4
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Question # 30
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Question # 31
The set of the first elements of the ordered pairs forming a relation is called its
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Function on B
Range
Domain
A into B
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