The inverse ratio of 4: 2: 1 is?
Options:
(A) 2:4:8
(B) 2:3:9
(C) 2:3:2
(D) 2:3:6
(E) 2:3:1
Answer and stream of consciousness: (A)
Stream of consciousness: 1/4: 1/2: 1/1 = 2:4:8

Every year an amount increases by 1/8th of itself. How much will it be after two years if its present value is Rs.64000?
Options:
(A) 81000
(B) 22887
(C) 26877
(D) 26771
(E) 17121
Answer and stream of consciousness: (A)
Stream of consciousness: 64000* 9/8 * 9/8 = 81000

There are 9 fictions and 6 non-fictions. How many cases are there such that 2 fictions and 2 non-fictions are selected from them?
Options:
(A) 90
(B) 120
(C) 540
(D) 180
(E) 200
Answer and stream of consciousness: (C)
Stream of consciousness: Number of ways of selecting 2 fiction books = 9C2
Number of ways of selecting 2 non fiction books = 6C2
9C2 * 6C2 = 36 * 15 = 540

What is the are of an equilateral triangle of side 14 cm?
Options:
(A) 663 cm2
(B) 743 cm2
(C) 643 cm2
(D) 493 cm2
(E) 143 cm2
Answer and stream of consciousness:
(D)
Stream of consciousness: Area of an equilateral triangle = 3/4 S2
If S = 14, Area of triangle = 3/4 * 14 * 14 = 493 cm2;