question: If Rs.7500 are borrowed at C.I at the rate of 4% per annum, then after 2 years the amount to be paid is?
Options:
(A) 3377
(B) 2688
(C) 2688
(D) 8112
(E) 1268
answer: Stream of consciousness: A = 7500(26/25)2 = 8112 The answer is (D).

q: What will come in place of the x in the following Number series? 46080, 3840, 384, x
Options:
(A) 48
(B) 3
(C) 4
(D) 5
(E) 6
a: Stream of consciousness: 46080 /12 = 3840
3840 /10 = 384
384 /8 = 48 The answer is (A).

question: There are 10 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) 675
(D) 180
(E) 200
answer: Stream of consciousness: Number of ways of selecting 2 fiction books = 10C2
Number of ways of selecting 2 non fiction books = 6C2
10C2 * 6C2 = 45 * 15 = 675 The answer is (C).

q: What is the % change in the area of a rectangle when its length increases by 60% and its width decreases by 60%?
Options:
(A) 0%
(B) 20% increase
(C) 36% decrease
(D) 1% decrease
(E) Insufficient data
a: Stream of consciousness: (16/10)*(4/10) = 64/100 of original area
64/100 is a 36% decrease from 100/100 -> The answer is (C).

question: X can finish a work in 21 days. Y can finish the same work in 15 days. Yworked for 10 days and left the job. how many days does X alone need to finish the remaining work?
Options:
(A) 3
(B) 5
(C) 7
(D) 8
(E) 9
answer: Stream of consciousness: Work done by X in 1 day = 1/21
Work done by Y in 1 day = 1/15
Work done by Y in 10 days = 10/15 = 2/3
Remaining work = 1 2/3 = 1/3
Number of days in which X can finish the remaining work = (1/3) / (1/21) = 7 The answer is (C).

question: If n is an integer, then the least possible value of |33 - 5n| is?
Options:
(A) 0
(B) 1
(C) 2
(D) 3
(E) 4
answer:
Stream of consciousness: |33 - 5n| represents the distance between 33 and 5n on the number line. Now, the distance will be minimized when 5n, which is multiple of 5, is closest to 33. Multiple of 5 which is closest to 33 is 35 (for n = 7), so the least distance is 2: |33 - 35| = 2. The answer is (C).