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QUANTITATIVE APTITUDE
Directions for question nos. 1-2: Eighty Five children went to amusement park where they could ride on merry –go-round roller coaster and Ferris wheel .It was known that 20 of them have took all three rides and 55 of them have taken at least two of the three rides. Each ride cost Rs.1 and the total receipt of the amusement park was Rs.145.

1) How many children did not try any of the rides. ?
A) 5 B) 10 C) 15 D) 20 
Ans. 15.
20 kids * 3 rides = Rs. 60
(55-20=)35 kids * 2 rides = Rs. 70
60 + 70 = Rs. 130
So, Rs. (145 – 130 = ) 15 are left for the other (85 – 55 = ) 30 kids . so only 15 of them can take a ride and rest 15 will be left out.
145 rides were taken. 20 of them took all three, i.e. Rs. 60 were spent, so 145-60= Rs. 85 are left for the others. Total kids were 85, so rest were 65. out of these 65, 

2) How many children took exactly one ride?
A) 5 B) 10 C) 15 D) 20 
Ans. 15

3) Four cities are connected by a road network as shown in the figure. In how many ways can you start from any city and come back to it without travelling on the same road more than once ?
A) 8
B) 12
C) 16
D) 20
Ans. 12. 
Consider the top city, the following are the 3 routes possible, starting from the leftmost edge. Since there are 3 edges emanating from each city and the figure is perfectly symmetrical, these 3 routes are possible from each edge, hence for any given city, the total number of routes = 4 * 3 = 12. 

Directions for question nos 4-5:
A, B, and C are three numbers, Let
@(A, B)= Average of A and B
*(A, B)=Product of A and B
/(A, B)=A divided by B

4) If A=2 and B=4 the value of @( / (*(A,B),B),A) would be 
A) 2 
B) 4 
C) 6 
D) 16
Ans. 2 

5) Sum of A and B is given by
A) *(@(A, B), 2) 
B) /(@(A,B),2) 
C) @(*(A,B),2) 
D) @(/(A,B),2
Ans. A.

6) Let x