651.
A and B, working together, take 15 days to complete a piece of work. If A alone can do this work in 18 days, then how long
would B take to complete the same work?
(A)
33 days
(B)
90 days
(C)
8 days
(D)
15 days
652.
What is the number which needs to be added to 20% of 460 to have the sum as 70% of 920?
(A)
926
(B)
762
(C)
552
(D)
335
653.
If 35 is the mean proportional of 25 and x, then what is value of x?
(A)
46
(B)
47
(C)
49
(D)
48
654.
If the side of a square is increased by 5%, then the percentage increase in its area will be:
(A)
(B)
(C)
(D)
655.
From the salary of a software engineer, if 15% is used as house rent, 25% of the remaining is spent on household items, 25%
of the remaining as income tax, and 15% of the remaining on clothing, then he is left with ₹10,404. Find his total salary.
(A)
₹22,600
(B)
₹24,600
(C)
₹25,600
(D)
₹23,600
656.
Two equal circles are drawn on a square in such a way that opposite side of the square forms the diameter
of each circle. If the remaining area of the square is 42 cm2, what is the measurement (in cm) of the
diameter of each circle?
(A)
3.5
(B)
2.5
(C)
14
(D)
7
657.
If the brick size is 25 cm×12 cm×9 cm, then how many bricks are required to construct a wall of length 10 m, breadth 22.5 cm
and height 6 m?
(A)
6000
(B)
4500
(C)
5000
(D)
8000
658.
The distance between the centres of two circles of radii 4 cm and 2 cm is 10 cm. The length (in cm) of a transverse common
tangent is:
(A)
13
(B)
11
(C)
6
(D)
8
659.
47 masons can dig a 35 m long trench in one day. How many masons should be employed for digging a 105 m long trench of
the same type in one day?
(A)
94
(B)
141
(C)
128
(D)
70
660.
When a number is increased by 8, it becomes 120% of itself. The number is:
