56 .
Some buildings are rivers
Some mountains are both buildings and rivers

Some buildings are trucks
Some trucks are rivers
A.Only I follows
B. Only II follows
C. Only III follows
D.Only IV follows
E.All of the above
57 .
A professional institute's total expenditure on students for a particular course is partly fixed and partly varies linearly with the number of students. The average expense per student is Rs. 615 when there are 24 students and Rs. 465 when there are 40 students.
What is the average expense when there are 60 students ?
A.Rs. 370
B. Rs. 390
C. Rs. 410
D.Rs. 430
E.Rs. 450
58 .
The ratio of the present age of Manisha and Deepali is 5 : X,
Manisha is 9 years younger than Parineeta,
Parineeta's age after 9 years will be 33 years,
The difference between Deepali's and Manisha's age is the same as the present age of Parineeta.

What should come in place of X ?
A.13
B. 15
C. 17
D.19
E.21
59 .
All tables are round
Some hills are round
Some rivers are hills
All rivers are conical

Some rivers are round
Some hills are conical
Some rivers are both hills and round
Some tables are conical
A.Only I follows
B. Only II follows
C. Only III follows
D.Only IV follows
E.All of the above