q: There are different 15 circles. What is the number of the greatest possible points with which the circles intersect?
Options:
(A) 390
(B) 100
(C) 110
(D) 180
(E) 210
a: OK... Maximum points of intersection between n different circles = n*(n - 1) = 15*14 = 210
The answer is (E).

q: Divide Rs.32000 in the ratio 3:5?
Options:
(A) 12000,20000
(B) 12000,20092
(C) 12000,20029
(D) 12000,20007
(E) 12000,20001
a: OK... 3/8 * 32000 = 12000
5/8 * 32000 = 20000
The answer is (A).

q: A person spends 1/3rd of the money with him on clothes, 1/5th of the remaining on food and 1/4th of the remaining on travel. Now, he is left with Rs 200. How much did he have with him in the beginning?
Options:
(A) s 200
(B) s 500
(C) s 300
(D) s 450
(E) s 550
a:
OK... Suppose the amount in the beginning was Rs 'x'
Money spent on clothes = Rs 1x/3 Balance = Rs 2x/3
Money spent on food = 1/5 of 2x/3 = Rs 2x/15
Balance = 2x/3 - 2x/15 = Rs 8x/15
Money spent on travel = 1/4 of 8x/15 = Rs 2x/15 = 8x/15 - 2x/15 = 6x/15 = Rs2x/5
Therefore 2x/5 = 200 = 500
The answer is (B).