question: In what time will Rs.4000 lent at 3% per annum on simple interest earn as much interest as Rs.5000 will earn in 5 years at 4% per annum on simple interest?
Options:
(A) 5 years
(B) 6 years
(C) 7 years
(D) 9 years
(E) 15 years
answer: Stream of consciousness: (4000*T*5)/100 = (5000*5*4)/100
T = 5 years The answer is (A).

q: The total number of problems in the mathematics and algebra books is 28 more than the total number of problems in the algebra and geometry books. How much lesser is the number of problems in the geometry book as compared to the mathematics book?
Options:
(A) 30
(B) 18
(C) 28
(D) 25
(E) 32
a: Stream of consciousness: (Mathematics + Algebra) - (Algebra + Geometry) = 28
Mathematics - Geometry = 28 The answer is (C).

question: If the personal income tax rate is lowered from 42% to 28%, what is the differential savings for a tax payer having an annual income before tax to the tune of $34500?
Options:
(A) $3500
(B) $5000
(C) $4830
(D) $7000
(E) $10000
answer: Stream of consciousness: Saving = (42-28)% of 34500 = 4830. The answer is (C).

q: If 1/2 of the air in a tank is removed with each stroke of a vacuum pump, what fraction of the original amount of air has been removed after 6 strokes ?
Options:
(A) 63/64
(B) 7/8
(C) 1/4
(D) 1/8
(E) 1/16
a: Stream of consciousness: Left After 1st stroke = 1/2
Left After 2nd stroke = 1/2 * 1/2 = 1/4
Left After 3rd stroke = 1/2 * 1/4 = 1/8
Left After 4th stroke = 1/2 * 1/8 = 1/16
Left After 5th stroke = 1/2 * 1/16 = 1/32
Left After 6th stroke = 1/2 * 1/32 = 1/64
So removed = 1- 1/64 = 63/64 The answer is (A).

question: There are 25 balls in a jar. You take out 5 blue balls without putting them back inside, and now the probability of pulling out a blue ball is 1/5. How many blue balls were there in the beginning?
Options:
(A) 12.
(B) 9.
(C) 8.
(D) 7.
(E) 6.
answer: Stream of consciousness: 9 = 5 blue balls + 20/ 5 The answer is (B).

question: If 4 girls can color 48 m long cloth in 2 days, then 6 girls can color 36 m long cloth in
Options:
(A) 1 1/5 days
(B) 1/5 day
(C) 1 day
(D) 2 days
(E) 3 days
answer:
Stream of consciousness: The length of cloth painted by one girl in one day = 48 / 4 2 = 6 m
No. of days required to paint 36 m cloth by 6 girls = 36/ 6 6 = 1 day. The answer is (C).